日本住友金属公司开发出一种能大幅度提高钛铝合金延伸率的新技术，采用这种技术，可使钛铝合金的延伸率从不到２％提高到４．６％。该项技术，是先将钛铝合金加热至１２００℃，进行锻造，然后再在１３００℃的高温进行热处理，使晶粒变小，呈均匀的二层结构，这样一来，不仅? Sumitomo Metal Japan has developed a new technology that will dramatically increase the elongation of titanium-aluminum alloys. With this technology, the elongation of titanium-aluminum alloys can be increased from less than 2% to 4.6%. The technology is the first titanium alloy heated to 1200 ℃, forging, and then heat treatment at a high temperature of 1300 ℃, the grain becomes smaller, was a uniform two-tier structure, so that not only?