Characteristics Of Titanium Metal

Titanium and titanium alloys have many excellent properties, mainly including high strength, high hardness, good mechanical properties, excellent corrosion resistance and high temperature ‌. Titanium will form an extremely thin, dense, blunt oxide film on the surface at room temperature, which can repair cracks by itself, thus having excellent corrosion resistance, and can resist the erosion of nitric acid, humid chlorine, dilute sulfuric acid, dilute hydroelectric acid and dilute alkali, and even aqua rega can not dissolve it.

Elemental titanium is silver-white and has a metallic luster. Its melting point is 1660 ° C, boiling point is 3287 ° C, density is 4.5g/cm³, 43% lighter than steel. Titanium has good ductility, hardness, heat resistance and electrical and thermal conductivity similar to other transition metals, but its density is much lighter than other metals with similar mechanical and heat resistance properties.

Titanium can react with non-metals such as oxygen, nitrogen, hydrogen, sulfur and halogens when heated. However, at room temperature, titanium can resist the erosion of a variety of chemical substances due to the protective oxide film formed on its surface. However, titanium cannot be applied to dry chlorine gas because of the violent chemical reactions that occur. For safe storage, titanium requires a certain amount of moisture to maintain its stability.

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‌High strength and hardness: the tensile strength of titanium alloy is between 686-1176mpa, and its density is only about 60% of steel, so the specific strength is very high. The hardness HRC of titanium alloy is 32-38.

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Good mechanical properties: the elastic modulus of titanium alloy is 1.078×10-1.176×10MPa, about half of that of steel and stainless steel. At high temperatures, titanium alloy can still maintain good mechanical properties, its heat resistance is much higher than that of aluminum alloy, and the operating temperature range is wide, and the working temperature of the new heat-resistant titanium alloy can reach 550-600 ℃.

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‌Excellent corrosion resistance: titanium in the air below 550℃, the surface will quickly form a thin and dense titanium oxide film, so in the atmosphere, seawater, nitric acid sulfuric acid and other oxidizing media and strong alkali, its corrosion resistance is better than most stainless steel.

‌High-temperature performance: titanium alloy through careful allocation of alloying elements, can maintain excellent strength and stability in high temperature environment, very suitable for aerospace and other high temperature working environment.