一、前言 由于飞机制造、导弹技术、造船、化工机械和无线电技术等重要工业部门对金属钛及其合金的需求量日益增长,因此,钛和钛合金生产近年来发展很快。钛及其合金生产的迅速发展,尖锐地提出了如何回收钛和钛合金废料这一重要和复杂的问题。根据国外文献资料和国内有色金属加工生产情况的调查:在以工业规模生产钛和钛合金零件的过程中,其材料的利用率仅仅为15—20％,而 I. INTRODUCTION Due to the increasing demand for titanium metal and its alloys in important industrial sectors such as aircraft manufacturing, missile technology, shipbuilding, chemical machinery and radio technology, the production of titanium and titanium alloys has developed rapidly in recent years. The rapid development of titanium and its alloy production has sharply raised the important and complicated issue of how to recover titanium and titanium alloy scrap. According to foreign literature and domestic non-ferrous metal processing production survey: in the industrial scale production of titanium and titanium alloy parts, the utilization rate of its material is only 15-20%, and