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Grade 20 Titanium vs. 7075 Aluminum

Grade 20 titanium belongs to the titanium alloys classification, while 7075 aluminum belongs to the aluminum alloys. There are 25 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is grade 20 titanium and the bottom bar is 7075 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
70
Elongation at Break, % 5.7 to 17
1.8 to 12
Fatigue Strength, MPa 550 to 630
110 to 190
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 47
26
Shear Strength, MPa 560 to 740
150 to 340
Tensile Strength: Ultimate (UTS), MPa 900 to 1270
240 to 590
Tensile Strength: Yield (Proof), MPa 850 to 1190
120 to 510

Thermal Properties

Latent Heat of Fusion, J/g 400
380
Maximum Temperature: Mechanical, °C 370
200
Melting Completion (Liquidus), °C 1660
640
Melting Onset (Solidus), °C 1600
480
Specific Heat Capacity, J/kg-K 520
870
Thermal Expansion, µm/m-K 9.6
23

Otherwise Unclassified Properties

Density, g/cm3 5.0
3.0
Embodied Carbon, kg CO2/kg material 52
8.3
Embodied Energy, MJ/kg 860
150
Embodied Water, L/kg 350
1120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 150
7.8 to 44
Resilience: Unit (Modulus of Resilience), kJ/m3 2940 to 5760
110 to 1870
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 33
46
Strength to Weight: Axial, points 50 to 70
22 to 54
Strength to Weight: Bending, points 41 to 52
28 to 52
Thermal Shock Resistance, points 55 to 77
10 to 25

Alloy Composition

Aluminum (Al), % 3.0 to 4.0
86.9 to 91.4
Carbon (C), % 0 to 0.050
0
Chromium (Cr), % 5.5 to 6.5
0.18 to 0.28
Copper (Cu), % 0
1.2 to 2.0
Hydrogen (H), % 0 to 0.020
0
Iron (Fe), % 0 to 0.3
0 to 0.5
Magnesium (Mg), % 0
2.1 to 2.9
Manganese (Mn), % 0
0 to 0.3
Molybdenum (Mo), % 3.5 to 4.5
0
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.12
0
Palladium (Pd), % 0.040 to 0.080
0
Silicon (Si), % 0
0 to 0.4
Titanium (Ti), % 71 to 77
0 to 0.2
Vanadium (V), % 7.5 to 8.5
0
Zinc (Zn), % 0
5.1 to 6.1
Zirconium (Zr), % 3.5 to 4.5
0 to 0.25
Residuals, % 0
0 to 0.15

Comparable Variants