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Grade 1 Titanium vs. 7175 Aluminum

Grade 1 titanium belongs to the titanium alloys classification, while 7175 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is grade 1 titanium and the bottom bar is 7175 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
70
Elongation at Break, % 28
3.8 to 5.9
Fatigue Strength, MPa 170
150 to 180
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 39
26
Shear Strength, MPa 200
290 to 330
Tensile Strength: Ultimate (UTS), MPa 310
520 to 570
Tensile Strength: Yield (Proof), MPa 220
430 to 490

Thermal Properties

Latent Heat of Fusion, J/g 420
380
Maximum Temperature: Mechanical, °C 320
180
Melting Completion (Liquidus), °C 1660
640
Melting Onset (Solidus), °C 1610
480
Specific Heat Capacity, J/kg-K 540
870
Thermal Conductivity, W/m-K 20
140
Thermal Expansion, µm/m-K 8.8
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.7
33
Electrical Conductivity: Equal Weight (Specific), % IACS 7.3
99

Otherwise Unclassified Properties

Base Metal Price, % relative 37
10
Density, g/cm3 4.5
3.0
Embodied Carbon, kg CO2/kg material 31
8.2
Embodied Energy, MJ/kg 510
150
Embodied Water, L/kg 110
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 79
18 to 29
Resilience: Unit (Modulus of Resilience), kJ/m3 230
1310 to 1730
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
46
Strength to Weight: Axial, points 19
48 to 52
Strength to Weight: Bending, points 23
48 to 51
Thermal Diffusivity, mm2/s 8.2
53
Thermal Shock Resistance, points 24
23 to 25

Alloy Composition

Aluminum (Al), % 0
88 to 91.4
Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 0
0.18 to 0.28
Copper (Cu), % 0
1.2 to 2.0
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
0 to 0.2
Magnesium (Mg), % 0
2.1 to 2.9
Manganese (Mn), % 0
0 to 0.1
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.18
0
Silicon (Si), % 0
0 to 0.15
Titanium (Ti), % 99.095 to 100
0 to 0.1
Zinc (Zn), % 0
5.1 to 6.1
Residuals, % 0
0 to 0.15