From the appearance point of view, metallic titanium is silver-gray, similar to steel. Compared with ordinary metals, titanium has many outstanding properties: low density and high strength, and can meet the needs of light construction when used in construction. The density of titanium is 4.54g/cm3, which is only 56% of ordinary structural steel, and its strength is equivalent to or higher than that of ordinary structural steel.
In metal structural materials, the specific strength of titanium is high, and the performance of many alloys is greatly improved after a small amount of titanium is added. The surface of titanium easily forms a solid oxide film with oxygen in the natural environment, which makes it have excellent corrosion resistance in oxidizing acid, alkali, and salt media, especially in wet chlorine and seawater. The thickness of the oxide film Different, different colors can be changed. Because of its strong corrosion resistance, considering the long-term maintenance cost, its long-term comprehensive cost is not higher than other metals, and it is especially suitable for harsh environments such as seashores, acid rain, and volcanic areas.
The shrinkage coefficient of titanium is 8.2×10-3mm/m·℃, which is about half of that of stainless steel and copper. It is suitable for use in environments with large temperature changes, and is more suitable for parts with large temperature changes such as building roofs. Titanium is a non-combustible material, its melting point is as high as 1660℃, and it can withstand a high temperature of 1100℃ in fire test. As a structural material, titanium alloy has much better thermal strength than aluminum alloy.
