中文摘要：

概括介绍了钛合金的性能特点，分析了钛合金切削加工困难的主要原因，重点对国内外切削加工钛合金的现状作了详细介绍，由此明确了目前国内和国外切削加工钛合金水平的差距，最后指出在国内寻求一种或几种高速切削加工钛合金刀具材料的紧迫性和必要性。

英文摘要：

The properties of titanium alloys are introduced generally in this passage, and the reasons of difficult - to - machining titanium alloys are analyzed, then, the state - of - the - art of high speed machining titanium alloys both at home and abroad is introduced particularly, through introduction, we clearly know the large gap of machining titanium alloys between our home and abroad. At last, it is pointed out that it＇s urgent and necessary to find out kinds of cutting tool materials, which is suitable to high speed machine titanium alloys.