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2025 Aluminum vs. Grade 15 Titanium

2025 aluminum belongs to the aluminum alloys classification, while grade 15 titanium belongs to the titanium 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 2025 aluminum and the bottom bar is grade 15 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
110
Elongation at Break, % 15
20
Fatigue Strength, MPa 130
290
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 27
41
Shear Strength, MPa 240
340
Tensile Strength: Ultimate (UTS), MPa 400
540
Tensile Strength: Yield (Proof), MPa 260
430

Thermal Properties

Latent Heat of Fusion, J/g 400
420
Maximum Temperature: Mechanical, °C 190
320
Melting Completion (Liquidus), °C 640
1660
Melting Onset (Solidus), °C 520
1610
Specific Heat Capacity, J/kg-K 870
540
Thermal Conductivity, W/m-K 150
21
Thermal Expansion, µm/m-K 23
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
3.4
Electrical Conductivity: Equal Weight (Specific), % IACS 120
6.7

Otherwise Unclassified Properties

Base Metal Price, % relative 10
37
Density, g/cm3 3.0
4.5
Embodied Carbon, kg CO2/kg material 7.9
32
Embodied Energy, MJ/kg 150
520
Embodied Water, L/kg 1130
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 55
100
Resilience: Unit (Modulus of Resilience), kJ/m3 450
870
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
35
Strength to Weight: Axial, points 37
33
Strength to Weight: Bending, points 40
33
Thermal Diffusivity, mm2/s 58
8.4
Thermal Shock Resistance, points 18
41

Alloy Composition

Aluminum (Al), % 90.9 to 95.2
0
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 3.9 to 5.0
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0 to 1.0
0 to 0.3
Magnesium (Mg), % 0 to 0.050
0
Manganese (Mn), % 0.4 to 1.2
0
Nickel (Ni), % 0
0.4 to 0.6
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.25
Ruthenium (Ru), % 0
0.040 to 0.060
Silicon (Si), % 0.5 to 1.2
0
Titanium (Ti), % 0 to 0.15
98.2 to 99.56
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0
0 to 0.4