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钛是一种化学元素。它是在1719年发现的,1910年人们才得到了纯钛,但是工业上只是在最近几年内才掌握了比较大规模的生产方法和开辟了钛的广泛用途,现在,人们还把钛看作是一种稀有金属。金属钛的外观与铜相似。它的熔化温度和沸腾温度都很高,它有很大的机械强度,比纯铁大一倍,比铝几乎大五倍。金属钛又是一种化学性能很稳定的金属。在海水中钛的耐腐蚀性胜过不锈钢。空气中的钛在低温和常温下不腐蚀,如果加热到600℃,钛表面上会产生一层保护性的氧化膜,氧化膜随着温度的升高而加厚。同时氧在空气中开始溶解,这样能增加它的硬度。
Titanium is a chemical element. It was discovered in 1719. In 1910, people only got pure titanium. However, in the last few years, the industry has only acquired a relatively large-scale production method and opened up a wide range of titanium. Nowadays, titanium is also regarded as Is a rare metal. The appearance of metallic titanium is similar to that of copper. Its melting temperature and boiling temperature are very high. It has great mechanical strength and is twice as large as pure iron and almost five times larger than aluminum. Metal titanium is also a chemically stable metal. Titanium in seawater is superior to stainless steel in corrosion resistance. Titanium in air does not corrode at low temperature and normal temperature. If it is heated to 600°C, a protective oxide film will be formed on the titanium surface, and the oxide film will be thickened with the increase of temperature. At the same time oxygen begins to dissolve in the air, which increases its hardness.