20世纪80年代后期,美国国防部提出对M198榴弹炮进行改进,要求该榴弹炮更轻,更稳定,移动性更好。BAE系统公司最终以使用钛铸件的设计赢得了合同。这也是钛铸件首次在地面火炮中应用。BAE公司新改进型M777155mm轻型榴弹炮使用了轻质、高强的Ti-6Al-4V合金铸件作为结构件,使榴弹炮 In the late 1980s, the U.S. Department of Defense proposed improvements to the M198 howitzer that required the howitzer to be lighter, more stable and more mobile. BAE Systems eventually won the contract for the design using titanium castings. This is also the first time that titanium castings have been used in ground artillery. BAE’s new modified M777155mm light howitzer uses lightweight, high-strength Ti-6Al-4V alloy castings as structural parts to make the howitzer