钛(Tai)镍(Nie)合(He)金(Jin)具(Ju)有(You)“(?)记(Ji)忆(Yi)”(?)本(Ben)领(Ling),(?)而(?)且(Qie)记(Ji)忆(Yi)力(Li)很(Hen)强(Qiang),(?)经(Jing)过(Guo)相(Xiang)当(Dang)长(Chang)的(De)时(Shi)间(Jian),(?)重(Zhong)复(Fu)千(Qian)万(Wan)次(Ci)都(Du)准(Zhun)确(Que)误(Wu)。(?)它(Ta)的(De)记(Ji)忆(Yi)本(Ben)领(Ling)就(Jiu)是(Shi)记(Ji)住(Zhu)它(Ta)原(Yuan)来(Lai)的(De)形(Xing)状(Zhuang),(?)所(Suo)以(Yi)人(Ren)们(Men)称(Cheng)它(Ta)为(Wei)“(?)形(Xing)状(Zhuang)记(Ji)忆(Yi)合(He)金(Jin)”(?)。(?)原(Yuan)来(Lai)这(Zhe)种(Zhong)合(He)金(Jin)有(You)一(Yi)个(Ge)特(Te)性(Xing)转(Zhuan)变(Bian)温(Wen)度(Du),(?)在(Zai)转(Zhuan)变(Bian)温(Wen)度(Du)之(Zhi)上(Shang),(?)它(Ta)具(Ju)有(You)一(Yi)种(Zhong)组(Zu)织(Zhi)结(Jie)构(Gou),(?)在(Zai)转(Zhuan)变(Bian)温(Wen)度(Du)之(Zhi)下(Xia),(?)它(Ta)又(You)有(You)另(Ling)一(Yi)种(Zhong)组(Zu)织(Zhi)结(Jie)构(Gou)。(?)结(Jie)构(Gou)不(Bu)同(Tong),(?)性(Xing)能(Neng)也(Ye)就(Jiu)不(Bu)同(Tong)。(?)例(Li)如(Ru):(?)一(Yi)种(Zhong)钛(Tai)镍(Nie)记(Ji)忆(Yi)合(He)金(Jin),(?)当(Dang)它(Ta)在(Zai)转(Zhuan)变(Bian)温(Wen)度(Du)之(Zhi)上(Shang)时(Shi),(?)很(Hen)坚(Jian)硬(Ying)、(?)强(Qiang)度(Du)大(Da),(?)而(?)在(Zai)这(Zhe)个(Ge)温(Wen)度(Du)之(Zhi)下(Xia),(?)它(Ta)却(Que)很(Hen)软(Ruan),(?)容(Rong)易(Yi)冷(Leng)加(Jia)工(Gong)。(?)这(Zhe)样(Yang),(?)当(Dang)我(Wo)们(Men)需(Xu)要(Yao)它(Ta)记(Ji)忆(Yi)什(Shi)么(Me)形(Xing)状(Zhuang)时(Shi),(?)就(Jiu)把(Ba)它(Ta)做(Zuo)成(Cheng)那(Na)种(Zhong)形(Xing)状(Zhuang),(?)这(Zhe)就(Jiu)是(Shi)它(Ta)的(De)“(?)永(Yong)久(Jiu)记(Ji)忆(Yi)”(?)形(Xing)状(Zhuang),(?)在(Zai)转(Zhuan)变(Bian)温(Wen)度(Du)以(Yi)下(Xia),(?)由(You)于(Yu)它(Ta)很(Hen)软(Ruan),(?)我(Wo)们(Men)便(Bian)可(Ke)以(Yi)在(Zai)相(Xiang)当(Dang)大(Da)的(De)程(Cheng)度(Du)内(Nei)使(Shi)其(Qi)任(Ren)意(Yi)变(Bian)形(Xing)。(?)而(?)当(Dang)需(Xu)要(Yao)它(Ta)恢(Hui)复(Fu)到(Dao)原(Yuan)来(Lai)形(Xing)状(Zhuang)时(Shi),(?)只(Zhi)要(Yao)把(Ba)它(Ta)加(Jia)热(Re)到(Dao)转(Zhuan)变(Bian)温(Wen)度(Du)以(Yi)上(Shang)就(Jiu)行(Xing)