Titanium: Key Physical Properties and Industrial Significance

Titanium: Key Physical Properties and Industrial Significance

Titanium is a silvery‑white transition metal celebrated for its lightweight, high strength, and exceptional corrosion resistance. It ranks 10th in Earth’s crust yet remains a rare metal because its natural distribution is sparse and extraction is complex. The following details outline the most critical physical characteristics that engineers, materials scientists, and industry leaders rely on.

1. Density & Temperature Data: 4.5 g / cm³; melting point 1,660 ± 10 °C; boiling point 3,287 °C. Valences +2, +3, +4 with an ionization energy of 6.82 eV.
2. Mechanical Strength & Workability: High strength paired with a low density. Plasticity increases with purity—higher purity titanium yields greater ductility.
3. Corrosion Resistance: Resistant to atmospheric exposure and seawater. At room temperature, it resists <7% HCl, <5% H₂SO₄, nitric acid, aqua regia, and dilute alkalis. Only concentrated acids (HF, HCl, H₂SO₄) or aggressive fluorides attack it.
4. Alloying Role: Vital alloying element in steel and advanced alloys. Density 4.506–4.516 g / cm³ at 20 °C, higher than aluminum yet lower than iron, copper, and nickel, while offering the highest specific strength among metals.
5. Phase & Thermodynamic Properties: Melting point 1,668 ± 4 °C, latent heat of fusion 3.7–5.0 kcal / g atom; boiling point 3,260 ± 20 °C, latent heat of vaporization 102.5–112.5 kcal / g atom; critical temperature 4,350 °C; critical pressure 1,130 atm.
6. Conductivity & Superconductivity: Poor thermal and electrical conductivity, comparable to or slightly below stainless steel. Pure titanium exhibits superconductivity with a critical temperature of 0.38–0.4 K.
7. Thermal & Magnetic Properties: At 25 °C, specific heat 0.126 cal / g atom · K, enthalpy 1,149 cal / g atom, entropy 7.33 cal / g atom · K. Paramagnetic with permeability 1.00004.
8. Plasticity & Shrinkage: High‑purity titanium can reach 50–60% elongation and 70–80% shrinkage, though shrinkage strength remains low.
9. Impurity Effects: Interstitial impurities (O, N, C) significantly increase strength but reduce ductility. Controlled impurity levels and alloying are essential for optimal performance.
10. Magnetic Neutrality: Non‑ferromagnetic; beneficial for applications such as nuclear submarine hulls where magnetic mines are a concern.

Conclusion

Understanding titanium’s physical properties is essential for designing high‑performance, corrosion‑resistant structures. For deeper insights into titanium and other refractory metals, visit Advanced Refractory Metal (ARM).

Headquartered in Lake Forest, California, ARM is a leading global supplier of refractory metals, offering tungsten, molybdenum, tantalum, rhenium, titanium, and zirconium at competitive prices.