《钛及钛合金牌号和化学成分》标准,伴随着我国钛工业的建立、发展和完善至今也经历了三个时期,如表1示: 冶标YB761-70的制订是鉴于当时的历史条件,建立了以原苏联标准为基础的我国钛加工材牌号系列。由于当时生产装备、技术水平较 “Titanium and titanium alloy grades and chemical composition of” standard, along with the establishment of our country titanium industry, development and improvement has gone through three periods, as shown in Table 1: The standard YB761-70 formulation in view of the historical conditions at that time, The establishment of the original Soviet Union-based standards of China’s titanium processing material grades series. Due to the production equipment, technical level