# Annealed Titanium 4-4-2

Annealed titanium 4-4-2 is titanium 4-4-2 in the annealed condition. The graph bars on the material properties cards below compare annealed titanium 4-4-2 to: wrought titaniums (top), all titanium alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

## Mechanical Properties

Elastic (Young's, Tensile) Modulus

110 *GPa* 16 *x 10 ^{6} psi*

Elongation at Break

10 *%*

Fatigue Strength

590 *MPa* 86 *x 10 ^{3} psi*

Poisson's Ratio

0.32

Reduction in Area

20 *%*

Shear Modulus

42 *GPa* 6.1 *x 10 ^{6} psi*

Shear Strength

690 *MPa* 100 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

1150 *MPa* 170 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

1030 *MPa* 150 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

410 *J/g*

Maximum Temperature: Mechanical

310 *°C* 590 *°F*

Melting Completion (Liquidus)

1610 *°C* 2930 *°F*

Melting Onset (Solidus)

1560 *°C* 2840 *°F*

Specific Heat Capacity

540 *J/kg-K* 0.13 *BTU/lb-°F*

Thermal Conductivity

6.7 *W/m-K* 3.9 *BTU/h-ft-°F*

Thermal Expansion

8.6 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

1.1 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

2.1 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

39 *% relative*

Density

4.7 *g/cm ^{3}* 290

*lb/ft*

^{3}Embodied Carbon

30 *kg CO _{2}/kg material*

Embodied Energy

480 *MJ/kg* 200 *x 10 ^{3} BTU/lb*

Embodied Water

180 *L/kg* 22 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

110 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

4700 *kJ/m ^{3}*

Stiffness to Weight: Axial

13 *points*

Stiffness to Weight: Bending

34 *points*

Strength to Weight: Axial

68 *points*

Strength to Weight: Bending

52 *points*

Thermal Diffusivity

2.6 *mm ^{2}/s*

Thermal Shock Resistance

86 *points*

## Alloy Composition

Ti | 85.8 to 92.2 | |

Mo | 3.0 to 5.0 | |

Al | 3.0 to 5.0 | |

Sn | 1.5 to 2.5 | |

Si | 0.3 to 0.7 | |

O | 0 to 0.25 | |

Fe | 0 to 0.2 | |

C | 0 to 0.080 | |

N | 0 to 0.050 | |

H | 0 to 0.015 | |

res. | 0 to 0.4 |

All values are % weight. Ranges represent what is permitted under applicable standards.

## Followup Questions

## Further Reading

Titanium and Titanium Alloys: Fundamentals and Applications, Christoph Leyens and Manfred Peters (editors), 2003

Titanium, 2nd ed., G. Lutjering and J. C. Williams, 2007

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015