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Grade 20 Titanium vs. 4045 Aluminum

Grade 20 titanium belongs to the titanium alloys classification, while 4045 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 4045 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
71
Elongation at Break, % 5.7 to 17
2.3
Fatigue Strength, MPa 550 to 630
45
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 47
27
Shear Strength, MPa 560 to 740
69
Tensile Strength: Ultimate (UTS), MPa 900 to 1270
120
Tensile Strength: Yield (Proof), MPa 850 to 1190
64

Thermal Properties

Latent Heat of Fusion, J/g 400
540
Maximum Temperature: Mechanical, °C 370
160
Melting Completion (Liquidus), °C 1660
600
Melting Onset (Solidus), °C 1600
580
Specific Heat Capacity, J/kg-K 520
900
Thermal Expansion, µm/m-K 9.6
21

Otherwise Unclassified Properties

Density, g/cm3 5.0
2.6
Embodied Carbon, kg CO2/kg material 52
7.8
Embodied Energy, MJ/kg 860
150
Embodied Water, L/kg 350
1070

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 150
2.4
Resilience: Unit (Modulus of Resilience), kJ/m3 2940 to 5760
29
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 33
54
Strength to Weight: Axial, points 50 to 70
13
Strength to Weight: Bending, points 41 to 52
21
Thermal Shock Resistance, points 55 to 77
5.7

Alloy Composition

Aluminum (Al), % 3.0 to 4.0
87.4 to 91
Carbon (C), % 0 to 0.050
0
Chromium (Cr), % 5.5 to 6.5
0
Copper (Cu), % 0
0 to 0.3
Hydrogen (H), % 0 to 0.020
0
Iron (Fe), % 0 to 0.3
0 to 0.8
Magnesium (Mg), % 0
0 to 0.050
Manganese (Mn), % 0
0 to 0.050
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
9.0 to 11
Titanium (Ti), % 71 to 77
0 to 0.2
Vanadium (V), % 7.5 to 8.5
0
Zinc (Zn), % 0
0 to 0.1
Zirconium (Zr), % 3.5 to 4.5
0
Residuals, % 0
0 to 0.15