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Grade 27 Titanium vs. 2011A Aluminum

Grade 27 titanium belongs to the titanium alloys classification, while 2011A aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is grade 27 titanium and the bottom bar is 2011A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
70
Elongation at Break, % 27
6.8 to 16
Fatigue Strength, MPa 170
75 to 100
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 41
26
Shear Strength, MPa 180
190 to 250
Tensile Strength: Ultimate (UTS), MPa 270
310 to 410
Tensile Strength: Yield (Proof), MPa 230
140 to 310

Thermal Properties

Latent Heat of Fusion, J/g 420
390
Maximum Temperature: Mechanical, °C 320
190
Melting Completion (Liquidus), °C 1660
660
Melting Onset (Solidus), °C 1610
550
Specific Heat Capacity, J/kg-K 540
870
Thermal Conductivity, W/m-K 21
130
Thermal Expansion, µm/m-K 8.7
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
33
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
96

Otherwise Unclassified Properties

Base Metal Price, % relative 37
11
Density, g/cm3 4.5
3.1
Embodied Carbon, kg CO2/kg material 33
7.9
Embodied Energy, MJ/kg 530
150
Embodied Water, L/kg 320
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 70
20 to 40
Resilience: Unit (Modulus of Resilience), kJ/m3 240
140 to 670
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
44
Strength to Weight: Axial, points 17
28 to 37
Strength to Weight: Bending, points 21
33 to 40
Thermal Diffusivity, mm2/s 8.8
49
Thermal Shock Resistance, points 21
14 to 18

Alloy Composition

Aluminum (Al), % 0
91.5 to 95.1
Bismuth (Bi), % 0
0.2 to 0.6
Carbon (C), % 0 to 0.080
0
Copper (Cu), % 0
4.5 to 6.0
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
0 to 0.5
Lead (Pb), % 0
0.2 to 0.6
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.18
0
Ruthenium (Ru), % 0.080 to 0.14
0
Silicon (Si), % 0
0 to 0.4
Titanium (Ti), % 99 to 99.92
0
Zinc (Zn), % 0
0 to 0.3
Residuals, % 0
0 to 0.15