Medical titanium bar has low density, light weight, high strength, good corrosion resistance, high temperature resistance, low temperature resistance, strong acid resistance, strong alkali resistance. Titanium is about as hard as steel, and it weighs almost half as much as steel of the same volume. Titanium is slightly heavier than aluminum, but it is twice as hard. Today, in rockets and missiles, titanium is largely used instead of steel. According to statistics, there are more than 1,000 tons of titanium used for space travel in the world every year. Extremely fine titanium powder, or a good fuel for rockets, so titanium is known as the universe metal, space metal.
Titanium has plasticity, the elongation of high purity titanium can reach 50-60%, the section shrinkage rate can reach 70-80%, but the strength is low, not suitable for structural materials. The presence of impurities in titanium has a great influence on its mechanical properties, especially the interspace impurities (oxygen, nitrogen, carbon) can greatly improve the strength of titanium and significantly reduce its plasticity. The good mechanical properties of titanium as a structural material are achieved by strictly controlling the appropriate impurity content and adding alloying elements.
Titanium has a high heat resistance and a melting point of 1,668. At room temperature, titanium can lie unharmed in the solution of various strong acids and bases. Even the most ferocious acid, aqua regia, could not corrode it. Titanium is not afraid of sea water. Someone once sank a piece of titanium to the bottom of the sea. After five years, he took it up and saw that it was covered with many small animals and plants on the bottom of the sea.
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