Titanium vs. Titanium Ti-6Al-4V

Compare Titanium vs. Titanium Ti-6Al-4V strength, stiffness, weight and thermal properties.

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Mechanical
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Yield strength	885MPasourcetypical, plate (>0.187 in), annealed, 0.2% offset	885MPasourcetypical, plate (>0.187 in), annealed, 0.2% offset
Ultimate tensile strength	940MPasourcetypical, plate, annealed	940MPasourcetypical, plate, annealed
Elongation at break	16%sourcetypical, in 2 in., plate annealed	16%sourcetypical, in 2 in., plate annealed
Young's modulus (stiffness)	107–122GPasourcetypical range, 20 °C	107–122GPasourcetypical range, 20 °C
Density	4,430kg/m³sourcenominal	4,430kg/m³sourcenominal
Strength to weight	200kN·m/kg	200kN·m/kg
Stiffness to weight	25.8MN·m/kg	25.8MN·m/kg
Poisson's ratio	0.342sourcemean of TIMET measurements	0.342sourcemean of TIMET measurements
Shear modulus	42.7GPa	42.7GPa
Bulk modulus	121GPa	121GPa
Speed of sound	5,084m/s	5,084m/s
Thermal
Thermal conductivity	6.6W/m·Ksourcetypical, 20 °C, mill annealed	6.6W/m·Ksourcetypical, 20 °C, mill annealed
Thermal expansion	9µm/m·Ksourcetypical, mean 0-100 °C	9µm/m·Ksourcetypical, mean 0-100 °C
100 mm part over a 50 °C swing	45µm growth	45µm growth
Specific heat	580J/kg·Ksourcetypical, 20 °C	580J/kg·Ksourcetypical, 20 °C
Heats up and cools (diffusivity)	2.57mm²/s	2.57mm²/s
Thermal shock resistance	3,730W/m	3,730W/m
Melting point	1,630–1,650°Csourcemelting range	1,630–1,650°Csourcemelting range
Max service temperature	400°Csourceupper recommended use temperature	400°Csourceupper recommended use temperature
Values for	TIMETAL 6-4 (Ti-6Al-4V Grade 5) annealed plate typical (TIMET properties manual) + TIMET datasheet TMC-0150 physical properties	TIMETAL 6-4 (Ti-6Al-4V Grade 5) annealed plate typical (TIMET properties manual) + TIMET datasheet TMC-0150 physical properties

Every value links to the document that states it. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.

Questions

Is Titanium stronger than Titanium Ti-6Al-4V?

Titanium is stronger: its yield strength is 885 MPa against 885 MPa for Titanium Ti-6Al-4V (0%).

Which is lighter, Titanium or Titanium Ti-6Al-4V?

Titanium is lighter: 4,430 kg/m³ against 4,430 kg/m³ for Titanium Ti-6Al-4V.

Which is stiffer, Titanium or Titanium Ti-6Al-4V?

Titanium is stiffer: Young's modulus 115 GPa against 115 GPa for Titanium Ti-6Al-4V, so the same part in Titanium deflects less under the same load.

Which is lighter for the same job, Titanium or Titanium Ti-6Al-4V?

For the same stiffness or strength they weigh about the same.

Part that must be	Titanium	Titanium Ti-6Al-4V
Stiff rod or tie (tension)	about equal	about equal
Stiff beam (bending)	about equal	about equal
Stiff panel or plate	about equal	about equal
Strong rod or tie	about equal	about equal
Strong beam	about equal	about equal
Strong panel or plate	about equal	about equal

For the same stiffness or strength, mass scales with density over stiffness (or strength) raised to a power set by how the part is loaded: 1 for a rod in tension, 1/2 for a beam in bending, 1/3 for a panel (the standard material-selection indices).

Which conducts heat better, Titanium or Titanium Ti-6Al-4V?

Titanium conducts heat better: 6.6 W/m·K against 6.6 W/m·K for Titanium Ti-6Al-4V.

Which expands less with temperature?

Titanium expands less: 9 µm/m·K against 9 µm/m·K for Titanium Ti-6Al-4V.

Among 59 materials

Stiffness against density

Strength against density