The Tool Desk
Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →A titanium-polymer lattice can combine low bulk density, measurable compressive strength and flotation—but it is not simply a lighter titanium alloy or a drop-in replacement for foam. In a 2026 study, researchers filled the internal channels of 3D-printed Ti-6Al-4V hollow struts with expandable polyurethane (PU), while leaving the lattice’s outer openings exposed. The foam helps retain air and exclude water; the titanium architecture carries compressive load. Results apply to that tested design and process, not to titanium or foam in general.
What the hybrid lattice is—and why the distinction matters
The study’s material is an engineered structure, not a new bulk metal. Its hollow Ti-6Al-4V struts were made using laser-based powder bed fusion, then injected internally with expandable PU. The lattice remains open-cell on the outside, while foam inside the struts helps create water-excluding, air-retaining volume. The primary study describes the architecture and its tests in Advanced Materials.
As an Amazon Associate I earn from qualifying purchases.
That arrangement matters when comparing it with foam or solid titanium. A foam block, a porous metal lattice, a foam-filled hollow-strut lattice and a solid titanium part have different geometries and volumes of material. Their effective density and ability to displace water are therefore not determined by the ingredient names alone.
How light is it compared with solid titanium?
The study reports a hybrid bulk density of 0.27–0.32 g/cm³, far below the density of solid Ti-6Al-4V. This is the effective density of the tested lattice structure, not the density of titanium itself. The open external cells contribute to low bulk density, but they are not sealed buoyant volume: water can enter them. For buoyancy predictions, the paper uses a skeletal-density framework rather than treating every open void as trapped air.
#1 Best Overall
- Titanium Sponge -20+80 mesh
- 1 Pound
The PU-filled internal channels provide the water-exclusion and air-retention mechanism. That combination helps explain why this open-cell structure can float; open porosity on its own does not establish that a metal lattice will do so.
What strength did the tested structure achieve?
In compression tests, the hybrid lattices had average measured yield strength of 10.8 ± 0.3 MPa, ultimate compressive strength of 12.4 ± 0.3 MPa, and elastic modulus of 567.9 ± 10.6 MPa. These are results for the study’s specimens under compression, not tensile-strength figures or universal design allowables.
Rank #2
- Premium Material: Made of high-quality polyurethane foam this air filter foam features excellent flexibility durability and resistance to deformation. The uniform foam structure provides reliable filtration performance while maintaining good airflow for long-term use
- Practical Function: Designed as a replacement filter material for air intake systems this foam filter helps capture dust dirt and debris while allowing sufficient airflow. The foam structure provides good breathability allowing sufficient air circulation to support stable engine intake performance during operation
- Cuttable Design: Measuring 14.8 × 14.3 × 0.6 inches this foam filter sheet can be easily cut into different shapes and sizes according to your equipment requirements. The flexible material allows convenient adjustment for different filter replacement needs
- Washable and Reusable: This foam filter material can be cleaned with water and mild detergent then reused after drying completely. The durable foam construction maintains its shape through repeated cleaning and use providing convenient maintenance for regular filter replacement needs
- Wide Application: This foam filter is suitable for off-road motorcycles dirt bikes ATVs UTVs and other vehicles or equipment requiring foam air filter material. It allows flexible use for various air intake filter replacement and DIY applications
The paper describes deformation beginning around the lattice nodes near yield. At ultimate compressive strength, cracks formed at top and bottom inlet holes; fracture planes were around 45 degrees, with limited post-yield deformation. Those observations are specific to the tested geometry and loading conditions.
How does it compare with foam and stainless steel at matched density?
For a hybrid specimen with bulk density of 0.27 ± 0.02 g/cm³, the study reports yield strength of 10.3 ± 0.04 MPa. It compares that value with density-scaled estimates—not same-shape components tested side by side—of about 5.5 MPa for HDPE and 6.9 MPa for 316L stainless steel.
Rank #3
- Crafted from 1/9" foam-backed mesh type: Gray mesh type unmatched noise reduction, and durability. Ideal for car interiors or home decor upgrades resists wear
- Crease-Free Rigid Tube Packaging: Shipped in crush-resistant tubes, the 60"–58" wide × 96" long mesh type arrives wrinkle-free and ready to install—no steaming/ironing required. Save time and start projects immediately
- Laser-Cut Precision & Professional Edges: Laser-verified dimensions ensure perfect alignment during installation. Features seamless edges and zero foam separation for flawless DIY or pro-level results
- Multi-Surface Versatility: Headliner fabric molds seamlessly around curves, can be Used for Automotive Seats, Boat Seats, Sunroof Panel, RV, Marine Interiors, Door Panels, Headliner, Sofa or Mattresses Padding
- YOKKIP Quality Assurance: Every headliner fabric undergoes rigorous inspection for color consistency, foam adhesion, and weave integrity. UV-resistant and humidity-proof—maintains color/peel resistance even after repeated cleaning
| Material or benchmark | Density basis | Yield strength |
|---|---|---|
| Ti-6Al-4V/PU hybrid lattice | 0.27 ± 0.02 g/cm³, reported for the compared specimen | 10.3 ± 0.04 MPa, measured |
| HDPE benchmark | Density-scaled estimate at the comparison density | Approximately 5.5 MPa, estimated |
| 316L stainless-steel benchmark | Density-scaled estimate at the comparison density | Approximately 6.9 MPa, estimated |
This is a useful indication that architecture can deliver compressive performance at low effective density. It is not proof that the hybrid is stronger than every foam or metal design: the study does not report a direct, same-geometry test against standalone foam or a conventional solid titanium part using one shared protocol.
Does the foam improve strength as well as flotation?
Within the study’s related hollow-strut lattice designs, adding PU increased bulk density by 5.9%–7.3%. The reported gains were 2.2%–3.6% in yield strength, 2.5%–4.1% in ultimate compressive strength and 1.3%–7.4% in elastic modulus. These are internal comparisons between the study’s architectures, not claims about how PU would affect an arbitrary titanium part.
Rank #4
- Content : 100% Polyester Weight : 11 oz per yard Width : 60" Inches Wide Backing : Laminated to a 3/16 inch Polyurethane Foam Backed UV Treated OEM Matching Style Headliner Made in the USA or Imported.
- Our Automotive Universal OEM Flat Knit Headliner Fabric can be used to repair or replace the interior ceiling fabric of your vehicle, boat, motor home. Use this automotive headlining fabric when your car needs revitalization whether it is dirty torn stained or sagging after years of use.
- SOLD BY THE YARD ALL : Fabrics are sold in continuous lengths. Price is by the running yard, so when purchasing, please remember to type the number of yards you need into the quantity box (on the top listing) and click Add to cart.
- USES : It can be used on Automobiles, Marine Interior Applications, Recreational Vehicles (RV) or Motor Homes and Other Commercial Vehicle.
- CARE INSTRUCTIONS : Spot Clear with Damp White Cloth.
How well does it float, including after damage?
The paper reports a Ti-6Al-4V+PU hybrid buoy floating stably in natural seawater. Its specimens retained flotation through substantial structural damage; buoyancy loss was associated mainly with compression and densification rather than immediate flooding. RMIT’s September 2026 account separately says samples floated in freshwater for more than two months. That reported duration is not a guarantee of field life or long-term marine performance.
After seawater immersion, the study reported average decreases of 0.37 ± 0.12% in yield strength and 0.86 ± 0.42% in ultimate compressive strength relative to unexposed comparison specimens, and mass loss of 0.15 ± 0.03%. These are laboratory exposure results, not a service-life certification.
Best Value
- Tool box liners, foam rubber padding, foam sheets for various uses. Crafting foam, drawer padding, foam rolls and sheets. Foam Padding Sheets - High density black foam sheet
- Versatile Material - XCEL closed cell foam rubber material offered in various thicknesses and sizes for all of your project needs
- Easy To Customize - To fit the needs of your project, whether using this material for cosplay foam, craft foam sheets, neoprene gasket DIY, padding, tool box liner and many other options.
- Antivibration Padding - Useful to customize and use in various scenarios in which you require some extra sound dampening material. This product is non-adhesive, but we do offer various options with adhesive as well XCEL Extra Large Marine Rolls Sheets with and without adhesive
- XCEL offers various closed cell neoprene rubber products and is continuing to add colors and various options to fit your project needs
What the comparison can—and cannot—tell you
- Weight: The reported 0.27–0.32 g/cm³ is bulk density for the tested lattice, not a new density for titanium.
- Strength: The available strength figures are compressive. They do not establish tensile strength, fatigue life or safe design limits for a particular application.
- Buoyancy: The tested structure’s flotation depends on its internal foam-filled channels; open external cells alone are not a substitute for a sealed buoyant volume.
- Manufacturing: The demonstrated route combines laser powder bed fusion with foam injection. The study does not establish production cost, scale-up or availability as a finished product.
- Foam substitution: The results apply to the study’s expandable polyurethane and injection process. Consumer retail foam products have not been validated as equivalent.
For an application decision, compare complete structures at the relevant density, geometry, loading direction and water exposure—not material labels in isolation. The evidence supports a promising lightweight, buoyant compressive lattice concept, but does not establish a general ranking of metamaterial, foam and conventional titanium.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
