鈦(tai)合金(jin)具(ju)有密(mi)度(du)低、比強度(du)高、耐蝕(shi)性(xing)(xing)好、導熱率低、無毒無磁、可焊接(jie)、生物相容(rong)性(xing)(xing)好、表面可裝(zhuang)飾性(xing)(xing)強等(deng)特性(xing)(xing)，是一種輕質(zhi)高強度(du)耐蝕(shi)結構(gou)材料(liao)，在武(wu)器裝(zhuang)備中具(ju)有廣泛應(ying)用前景，并已經廣泛應(ying)用于(yu)航(hang)空、航(hang)天、化工、石油、電力、醫療(liao)、建筑、體育用品(pin)等(deng)領域。

作為(wei)飛(fei)機(ji)(ji)(ji)機(ji)(ji)(ji)體結(jie)構(gou)和飛(fei)機(ji)(ji)(ji)發(fa)動(dong)(dong)(dong)(dong)機(ji)(ji)(ji)的(de)(de)(de)主(zhu)要(yao)結(jie)構(gou)材料(liao)之一，鈦(tai)(tai)(tai)(tai)合金的(de)(de)(de)應(ying)用(yong)(yong)(yong)(yong)(yong)水平(ping)是(shi)衡量(liang)(liang)飛(fei)機(ji)(ji)(ji)選材先(xian)(xian)進程(cheng)度的(de)(de)(de)重(zhong)要(yao)標志之一，是(shi)影響飛(fei)機(ji)(ji)(ji)戰術性能(neng)的(de)(de)(de)一個重(zhong)要(yao)方(fang)面(mian)。在國(guo)外第三代(dai)戰斗機(ji)(ji)(ji)上，鈦(tai)(tai)(tai)(tai)合金用(yong)(yong)(yong)(yong)(yong)量(liang)(liang)占機(ji)(ji)(ji)體結(jie)構(gou)重(zhong)量(liang)(liang)比為(wei)20%～25%，在第四代(dai)戰斗機(ji)(ji)(ji)F-22（EMD）上已(yi)高達41%，其(qi)應(ying)用(yong)(yong)(yong)(yong)(yong)呈大幅度上升趨勢。航空發(fa)動(dong)(dong)(dong)(dong)機(ji)(ji)(ji)的(de)(de)(de)用(yong)(yong)(yong)(yong)(yong)鈦(tai)(tai)(tai)(tai)量(liang)(liang)也(ye)在逐步(bu)增(zeng)(zeng)加，國(guo)外先(xian)(xian)進航空發(fa)動(dong)(dong)(dong)(dong)機(ji)(ji)(ji)的(de)(de)(de)鈦(tai)(tai)(tai)(tai)用(yong)(yong)(yong)(yong)(yong)量(liang)(liang)已(yi)達30%左右(you)，例如V2500發(fa)動(dong)(dong)(dong)(dong)機(ji)(ji)(ji)的(de)(de)(de)鈦(tai)(tai)(tai)(tai)用(yong)(yong)(yong)(yong)(yong)量(liang)(liang)就高達31%，第四代(dai)發(fa)動(dong)(dong)(dong)(dong)機(ji)(ji)(ji)F119的(de)(de)(de)鈦(tai)(tai)(tai)(tai)合金用(yong)(yong)(yong)(yong)(yong)量(liang)(liang)為(wei)40%。在民用(yong)(yong)(yong)(yong)(yong)飛(fei)機(ji)(ji)(ji)方(fang)面(mian)，鈦(tai)(tai)(tai)(tai)合金用(yong)(yong)(yong)(yong)(yong)量(liang)(liang)也(ye)在逐步(bu)增(zeng)(zeng)長(chang)，A380用(yong)(yong)(yong)(yong)(yong)鈦(tai)(tai)(tai)(tai)占總重(zhong)量(liang)(liang)的(de)(de)(de)10%，單機(ji)(ji)(ji)用(yong)(yong)(yong)(yong)(yong)鈦(tai)(tai)(tai)(tai)材約60噸(dun)。空中客(ke)車的(de)(de)(de)鈦(tai)(tai)(tai)(tai)用(yong)(yong)(yong)(yong)(yong)量(liang)(liang)已(yi)從第三代(dai)A320的(de)(de)(de)4.5%增(zeng)(zeng)至第四代(dai)A340的(de)(de)(de)6%，而(er)即將問世(shi)的(de)(de)(de)A350客(ke)機(ji)(ji)(ji)的(de)(de)(de)鈦(tai)(tai)(tai)(tai)用(yong)(yong)(yong)(yong)(yong)量(liang)(liang)進一步(bu)提高至15%。