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7129 Aluminum vs. Grade 20 Titanium

7129 Aluminum belongs to the aluminum alloys classification, while grade 20 titanium belongs to the titanium alloys. There are 25 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is 7129 Aluminum and the bottom bar is grade 20 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
120
Elongation at Break, % 9.0 to 9.1
5.7 to 17
Fatigue Strength, MPa 150 to 190
550 to 630
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 26
47
Shear Strength, MPa 250 to 260
560 to 740
Tensile Strength: Ultimate (UTS), MPa 430
900 to 1270
Tensile Strength: Yield (Proof), MPa 380 to 390
850 to 1190

Thermal Properties

Latent Heat of Fusion, J/g 380
400
Maximum Temperature: Mechanical, °C 180
370
Melting Completion (Liquidus), °C 630
1660
Melting Onset (Solidus), °C 510
1600
Specific Heat Capacity, J/kg-K 880
520
Thermal Expansion, µm/m-K 24
9.6

Otherwise Unclassified Properties

Density, g/cm3 2.9
5.0
Embodied Carbon, kg CO2/kg material 8.3
52
Embodied Energy, MJ/kg 150
860
Embodied Water, L/kg 1150
350

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37 to 38
71 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1090
2940 to 5760
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
33
Strength to Weight: Axial, points 41
50 to 70
Strength to Weight: Bending, points 43 to 44
41 to 52
Thermal Shock Resistance, points 19
55 to 77

Alloy Composition

Aluminum (Al), % 91 to 94
3.0 to 4.0
Carbon (C), % 0
0 to 0.050
Chromium (Cr), % 0 to 0.1
5.5 to 6.5
Copper (Cu), % 0.5 to 0.9
0
Gallium (Ga), % 0 to 0.030
0
Hydrogen (H), % 0
0 to 0.020
Iron (Fe), % 0 to 0.3
0 to 0.3
Magnesium (Mg), % 1.3 to 2.0
0
Manganese (Mn), % 0 to 0.1
0
Molybdenum (Mo), % 0
3.5 to 4.5
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.12
Palladium (Pd), % 0
0.040 to 0.080
Silicon (Si), % 0 to 0.15
0
Titanium (Ti), % 0 to 0.050
71 to 77
Vanadium (V), % 0 to 0.050
7.5 to 8.5
Zinc (Zn), % 4.2 to 5.2
0
Zirconium (Zr), % 0
3.5 to 4.5
Residuals, % 0
0 to 0.4

Comparable Variants