Materials / Compare
Glass vs. Titanium Ti-6Al-4V
Compare Glass vs. Titanium Ti-6Al-4V strength, stiffness, weight and thermal properties.
| Try it on a partA sample part to run stress or thermal on, free in your browser | Open in LessCAD | Open in LessCAD |
|---|---|---|
| Mechanical | ||
| Yield strength | not given (tensile used) | 885MPasourcetypical, plate (>0.187 in), annealed, 0.2% offset |
| Ultimate tensile strength | 41MPasourcetypical mean surface tensile stress at fracture (MOR), 60 s load, weathered, 50% breakage probability | 940MPasourcetypical, plate, annealed |
| Flexural strength | 41MPasourcemean MOR (same value as tensile) | not sourced |
| Elongation at break | not sourced | 16%sourcetypical, in 2 in., plate annealed |
| Young's modulus (stiffness) | 72GPasourcetypical | 107–122GPasourcetypical range, 20 °C |
| Density | 2,500kg/m³sourcetypical | 4,430kg/m³sourcenominal |
| Strength to weight | 16.4kN·m/kg | 200kN·m/kg12.2x higher |
| Stiffness to weight | 28.8MN·m/kg11% higher | 25.8MN·m/kg |
| Poisson's ratio | 0.22sourcetypical | 0.342sourcemean of TIMET measurements |
| Shear modulus | 29.5GPa | 42.7GPa45% stiffer in shear |
| Bulk modulus | 42.9GPa | 121GPa |
| Speed of sound | 5,367m/s | 5,084m/s |
| Thermal | ||
| Thermal conductivity | 0.937W/m·Ksourcetypical at 75 F | 6.6W/m·Ksourcetypical, 20 °C, mill annealed |
| Thermal expansion | 8.3µm/m·Ksourcetypical, 75-575 F | 9µm/m·Ksourcetypical, mean 0-100 °C |
| 100 mm part over a 50 °C swing | 41.5µm growth8% less | 45µm growth |
| Specific heat | 880J/kg·Ksourcetypical at 75 F | 580J/kg·Ksourcetypical, 20 °C |
| Heats up and cools (diffusivity) | 0.426mm²/s | 2.57mm²/s6.03x faster |
| Thermal shock resistance | 50.1W/m | 3,730W/m74.4x more resistant |
| Melting point | not sourced | 1,630–1,650°Csourcemelting range |
| Max service temperature | 511°Csourcestrain point (ASTM C336) - stress-relaxation onset, not a rated service limit | 400°Csourceupper recommended use temperature |
| Values for | Annealed soda-lime-silica float glass, Pilkington North America Technical Bulletin ATS-129 (04/2025) | TIMETAL 6-4 (Ti-6Al-4V Grade 5) annealed plate typical (TIMET properties manual) + TIMET datasheet TMC-0150 physical properties |
Every value links to the document that states it. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.
Questions
Is Glass stronger than Titanium Ti-6Al-4V?
Titanium Ti-6Al-4V is stronger: its yield strength is 885 MPa against tensile strength 41 MPa for Glass (21.6x).
Which is lighter, Glass or Titanium Ti-6Al-4V?
Glass is lighter: 2,500 kg/m³ against 4,430 kg/m³ for Titanium Ti-6Al-4V.
Which is stiffer, Glass or Titanium Ti-6Al-4V?
Titanium Ti-6Al-4V is stiffer: Young's modulus 115 GPa against 72 GPa for Glass, so the same part in Titanium Ti-6Al-4V deflects less under the same load.
Which is lighter for the same job, Glass or Titanium Ti-6Al-4V?
For the same stiffness or strength: Glass is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate; Titanium Ti-6Al-4V is lighter for a strong rod or tie, strong beam, strong panel or plate.
| Part that must be | Glass | Titanium Ti-6Al-4V |
|---|---|---|
| Stiff rod or tie (tension) | lighter | 11% heavier |
| Stiff beam (bending) | lighter | 41% heavier |
| Stiff panel or plate | lighter | 1.52x heavier |
| Strong rod or tie | 12.2x heavier | lighter |
| Strong beam | 4.37x heavier | lighter |
| Strong panel or plate | 2.62x heavier | lighter |
For the same stiffness or strength, mass scales with density over stiffness (or strength) raised to a power set by how the part is loaded: 1 for a rod in tension, 1/2 for a beam in bending, 1/3 for a panel (the standard material-selection indices).
Which conducts heat better, Glass or Titanium Ti-6Al-4V?
Titanium Ti-6Al-4V conducts heat better: 6.6 W/m·K against 0.937 W/m·K for Glass.
Which expands less with temperature?
Glass expands less: 8.3 µm/m·K against 9 µm/m·K for Titanium Ti-6Al-4V.