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１前言钛及钛合金具有密度小、比强度高和耐蚀性好等优良特性。随着国民经济及国防工业的发展，钛已日渐被人们普遍认识，广泛地应用于汽车、电子、化工、航空、航天、兵器等领域，从目前的市场走向来看，在不久的将来钛及钛合金在汽车工业和民用工业领域将得到广泛应用，成为
1 Introduction Titanium and titanium alloys have the advantages of low density, high specific strength and good corrosion resistance. With the development of the national economy and national defense industry, titanium has been widely recognized by people and widely used in the fields of automobile, electronics, chemical industry, aviation, spaceflight, weaponry and so on. From the current market trend, in the near future, titanium and Titanium alloy in the automotive industry and civilian industries will be widely used to become