(一)钛合金的特性和用途人类会用金属已经有几千年的历史了。在长期和自然作斗争的过程中,人们首先获得了生产和使用铜、铁以及它们合金的知识,接着又掌握了其他好多种金属材料。但是在工业上生产钛,却还是近十几年来的事情。至于开始研究、生产和应用钛合金,只有十年左右的历史。但是在短短的十年中,钛合金却引起了 (A) the characteristics and uses of titanium alloys Humans have used metal for thousands of years of history. In the long struggle against nature, people first gained knowledge of the production and use of copper, iron, and their alloys, and then mastered a great many other metallic materials. But in the industrial production of titanium, but it is still a matter of more than a decade. As for the beginning of research, production and application of titanium alloy, only about ten years of history. But in a short span of ten years, titanium alloy has been caused