前言钛的比重小(4.5克/厘米~3),约比铜(8.3～9克/厘米~3)轻一倍;熔点为1720～1800℃,沸点为2800～3000℃;硬度Hb=120～300;在结构材料之中,它具有较高的强度(20.9公斤/毫米~2);在常温下,钛在工业大气中和在海水中皆有较高的耐蚀性,但在温度高达400～500℃以上时,钛便与氧、卤素、硫、碳、氮及其它元素起强烈的相互作用。而且,当加热达400～500℃时,钛合金 Preface The specific gravity of titanium is small (4.5g / cm ~ 3), which is about double that of copper (8.3-9g / cm ~ 3); its melting point is 1720-1800 ℃ and its boiling point is 2800-3000 ℃; 300; Among the structural materials, it has a higher strength (20.9 kg / mm ~ 2); at room temperature, titanium in the industrial atmosphere and in sea water all have high corrosion resistance, but at temperatures up to 400 Above 500 ° C, titanium interacts strongly with oxygen, halogens, sulfur, carbon, nitrogen and other elements. Moreover, when heated up to 400 ~ 500 ℃, titanium alloy