Aluminum 6063-T6 vs. Titanium Ti-6Al-4V

Compare Aluminum 6063-T6 vs. Titanium Ti-6Al-4V strength, stiffness, weight and thermal properties.

Change either side

Mechanical
Try it on a partA bracket to run stress or thermal on, free in your browser	Open in LessCAD	Open in LessCAD
Yield strength	215MPasourcetypical, T6, 0.0625 in specimen	885MPasourcetypical, plate (>0.187 in), annealed, 0.2% offset
Ultimate tensile strength	240MPasourcetypical, T6	940MPasourcetypical, plate, annealed
Elongation at break	12%sourcetypical, T6, in 4D	16%sourcetypical, in 2 in., plate annealed
Young's modulus (stiffness)	69GPasourcetypical	107–122GPasourcetypical range, 20 °C
Density	2,700kg/m³sourcenominal, 20 °C	4,430kg/m³sourcenominal
Strength to weight	79.6kN·m/kg	200kN·m/kg2.51x higher
Stiffness to weight	25.6MN·m/kg	25.8MN·m/kg1% higher
Poisson's ratio	not sourced	0.342sourcemean of TIMET measurements
Shear modulus	not sourced	42.7GPa
Bulk modulus	not sourced	121GPa
Speed of sound	5,055m/s	5,084m/s
Thermal
Thermal conductivity	201W/m·Ksourcetypical, T6, 20 °C	6.6W/m·Ksourcetypical, 20 °C, mill annealed
Thermal expansion	23.4µm/m·Ksourcetypical, mean 20-100 °C	9µm/m·Ksourcetypical, mean 0-100 °C
100 mm part over a 50 °C swing	117µm growth	45µm growth2.6x less
Specific heat	901J/kg·Ksourcetypical, 20 °C (Hydro EN AW-6063)	580J/kg·Ksourcetypical, 20 °C
Heats up and cools (diffusivity)	82.6mm²/s32.2x faster	2.57mm²/s
Thermal shock resistance	not sourced	3,730W/m
Melting point	615–655°Csourcemelting range	1,630–1,650°Csourcemelting range
Max service temperature	not sourced	400°Csourceupper recommended use temperature
Values for	6063-T6 extruded tube, Kaiser Aluminum Tube & Pipe Alloy 6063 Technical Data (Rev. 05/06), typical properties; specific heat from Hydro EN AW-6063 extruded-products datasheet (Rev.4, 03/2023).	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 Aluminum 6063-T6 stronger than Titanium Ti-6Al-4V?

Titanium Ti-6Al-4V is stronger: its yield strength is 885 MPa against 215 MPa for Aluminum 6063-T6 (4.12x).

Which is lighter, Aluminum 6063-T6 or Titanium Ti-6Al-4V?

Aluminum 6063-T6 is lighter: 2,700 kg/m³ against 4,430 kg/m³ for Titanium Ti-6Al-4V.

Which is stiffer, Aluminum 6063-T6 or Titanium Ti-6Al-4V?

Titanium Ti-6Al-4V is stiffer: Young's modulus 115 GPa against 69 GPa for Aluminum 6063-T6, so the same part in Titanium Ti-6Al-4V deflects less under the same load.

Which is lighter for the same job, Aluminum 6063-T6 or Titanium Ti-6Al-4V?

For the same stiffness or strength: Aluminum 6063-T6 is lighter for a stiff beam (bending), stiff panel or plate; Titanium Ti-6Al-4V is lighter for a stiff rod or tie (tension), strong rod or tie, strong beam, strong panel or plate.

Part that must be	Aluminum 6063-T6	Titanium Ti-6Al-4V
Stiff rod or tie (tension)	1% heavier	lighter
Stiff beam (bending)	lighter	27% heavier
Stiff panel or plate	lighter	39% heavier
Strong rod or tie	2.51x heavier	lighter
Strong beam	1.57x heavier	lighter
Strong panel or plate	24% heavier	lighter

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, Aluminum 6063-T6 or Titanium Ti-6Al-4V?

Aluminum 6063-T6 conducts heat better: 201 W/m·K against 6.6 W/m·K for Titanium Ti-6Al-4V.

Which expands less with temperature?

Titanium Ti-6Al-4V expands less: 9 µm/m·K against 23.4 µm/m·K for Aluminum 6063-T6.

Among 72 materials

Stiffness against density

Strength against density