Titanium is the density of 4.5 g/cm3, 57% of steel;Less than two times heavier than aluminum and titanium strength is three times bigger than aluminum.Than the strength and the ratio of the density, strength when compared with different materials, the specific strength of titanium alloy is almost the biggest of the commonly used industrial alloy.The specific strength of titanium alloy is stainless steel of 3.5 times, 1.3times of aluminum alloy, magnesium alloy 1.7 times, so it is necessary for the aerospace industry structure material.Titanium and other metals density and strength of comparison.Titanium high melting point, thermal conductivity and electrical conductivity, similar to or slightly lower than stainless steel, titanium with superconductivity, the superconducting critical temperature for pure titanium 0.38.4 K.Titanium is a non-magnetic substance.
Titanium alloy is solid solution consisting of a single phase alloy, density is small, whether in the practical application of general temperature or at higher temperature, all is "a" phase, organizational stability, abrasion resistance higher than that of pure titanium, antioxidant ability.In 500-600 degrees Fahrenheit, still maintain its strength and creep resistance, heat treatment can be strengthened, and have good heat resistance and thermal stability, good welding performance, good at room temperature, temperature and high temperature performance.
Pure titanium (commercial pure titanium) is titanium content of no less than 99% and contain a small amount of iron, carbon, oxygen, nitrogen and hydrogen impurities such as the density of titanium.The effects on the mechanical properties of the pure titanium is the strongest impurity oxygen, nitrogen and iron, especially with oxygen.Hydrogen with titanium reaction is reversible, the impact on the
performance of the titanium main show is the hydrogen embrittlement, usually hydrogen content shall not exceed 0.015%, general containing 0.15% - 0.3% oxygen and 0.3% - 0.3% nitrogen.Industrial pure titanium in normal temperature is close to the six-party lattice, but the shaft is small (c/a = 1.587), has good workability, the formability of pure titanium and welding performance is good, is not sensitive to heat treatment.
