中文摘要：

有双阶段的结构(alpha+beta ) 的 alpha 钛和它的合金在大约 10 ~ 的紧张率下面动态地被使变形 4 s~(-1) 。形成和微结构进化局部性砍乐队们被扫描电子显微镜学(SEM ) 和传播电子显微镜学(TEM ) 描绘。结果表明紧张和紧张率应该同时被看作机械条件为砍乐队形成，和 twinning 是变丑的一个重要模式。试验性并且在乐队以内的材料经历了的计算表演超高频率的紧张率(9X10 ~ 5 s~(-1)) 变丑，它是平均紧张率的二大小要求了为砍乐队形成；在乐队的脱臼能被压缩并且发展成房间结构；到在乐队以内的 alpha_2 的阶段转变 fromalpha 被观察，并且转变产品(alpha_2 ) 与他们的父母一起有某个结晶的取向关系；有在在乐队以内观察的直径的 10 亩 m 的一种平均尺寸的 equiaxed 谷物被建议是再结晶的结果。

英文摘要：

α-titanium and its alloys with a dual-phase structure （α＋β） were deformed dynamically under strain rate of about 10^4 s^-1. The formation and microstructural evolution of the localized shear bands were characterized by scanning electron microscopy （SEM） and transmission electron microscopy （TEM）. The results reveal that both the strain and strain rate should be considered simultaneously as the mechanical conditions for shear band formation, and twinning is an important mode of deformation. Both experimental and calculation show that the materials within the bands underwent a superhigh strain rate （9×10^5 S^-1） deformation, which is two magnitudes of that of average strain rate required for shear band formation; the dislocations in the bands can be constricted and developed into cell structures; the phase transformation from α to α2 within the bands was observed, and the transformation products （α2） had a certain crystallographic orientation relationship with their parent; the equiaxed grains with an average size of 10 μm in diameter observed within the bands are proposed to be the results of recrystallization.