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钛及其合金是一种新兴的金屬材料。钛合金的强度約为鋁合金的2～3倍,鎂合金的5倍,可以与合金鋼嫓美。它的彈性系数約为鋼的一半,而比鋁、鎂为高。它的比重为4.5,約为铁的56％。此外钛及其合金还具有耐高溫耐腐蝕的性能。所有这些优良性質,均使这种金屬材料在工程上有很大用途。目前钛主要应用在航空工业上,根据文献資料,設計中的超音速飞机需用钛40％,將来尚可能增至60％。可以預料:祇要設法降低钛的冶煉成本,那么这种金屬材料,在其他工程領域內,同样也可以得到广泛的应用。
Titanium and its alloys is a new metal material. The strength of titanium alloy is about 2 to 3 times that of aluminum alloy and 5 times that of magnesium alloy, so it can be used with alloy steel. Its elastic modulus is about half that of steel, but higher than that of aluminum and magnesium. Its weight is 4.5, about 56% of iron. In addition, titanium and its alloys also have high temperature corrosion resistance. All of these fine qualities make this metal material of great utility in engineering. At present, titanium is mainly used in the aviation industry. According to the literature, the supersonic aircraft under design needs 40% of titanium and may increase to 60% in the future. It can be expected that as long as the method of reducing the smelting cost of titanium is employed, this metal material can also be widely used in other engineering fields as well.