Al是钛合金最重要的合金元素,是α相稳定元素之一。Al作为钛的合金元素具有促进钛的轻量化,改善抗氧化性,提高强度(α相固溶强化)等许多作用。但是从Ti-Al二元相图可知,多量添加Al,会生成Ti3Al相,导致合金产生严重脆性,因 Al is the most important alloying element of titanium alloy and is one of α-phase stable elements. Al as an alloying element of titanium has many functions such as promoting the weight reduction of titanium, improving the oxidation resistance, and increasing the strength (α-phase solid solution strengthening). However, from the Ti-Al binary phase diagram shows that adding a large amount of Al, will generate Ti3Al phase, resulting in severe brittleness of the alloy due to