In the present work, the influence of pre-induced $\{10\overline{\mathrm{1}}2\}$ twin characteristics on detwinning activation in a basal texture magnesium alloy is systematically investigated by a combination of electron backscatter diffraction technique and mechanical tests. Samples containing pre-induced $\{10\overline{\mathrm{1}}2\}$ twin variants with different morphological characteristics are prepared by pre-strain path change tests comprised two pre-strain paths: (i) compression along the rolling direction of magnesium alloy plate; (ii) tension along the normal direction of magnesium alloy plate. In the former case, a single $\{10\overline{\mathrm{1}}2\}$ twin variant or a $\{10\overline{\mathrm{1}}2\}$ twin pair is formed in one grain. While, multiple $\{10\overline{\mathrm{1}}2\}$ twin variants are usually activated simultaneously in one grain in the latter case. During subsequent compression along normal direction, detwinning process is effectively retarded for the samples containing multiple $\{10\overline{\mathrm{1}}2\}$ twin variants in one grain. Meanwhile, the yield stress of corresponding samples is enhanced as well, compared to that of the samples containing a single $\{10\overline{\mathrm{1}}2\}$ twin variant or a $\{10\overline{\mathrm{1}}2\}$ twin pair in one grain. According to these experimental features, the possible reasons behind such phenomena are proposed and discussed.

在目前的工作中，预诱发的影响 $\{10\overline{\mathrm{1个}}\mathrm{2个}\}$通过电子背散射衍射技术和力学测试相结合，系统地研究了基体镁合金中解缠激活的双特征。样品中含有预先诱导的$\{10\overline{\mathrm{1个}}\mathrm{2个}\}$通过包括两个预应变路径的预应变路径变化测试，制备了具有不同形态特征的孪生变体：（i）沿镁合金板材轧制方向的压缩；（ii）沿镁合金板法线方向的张力。在前一种情况下，$\{10\overline{\mathrm{1个}}\mathrm{2个}\}$ 孪生变体或 $\{10\overline{\mathrm{1个}}\mathrm{2个}\}$双胞胎在一个晶粒中形成。同时，多个$\{10\overline{\mathrm{1个}}\mathrm{2个}\}$在后一种情况下，通常会同时激活两个变体中的一个。在随后沿法线方向压缩的过程中，对于包含多个样本的样本，解缠绕过程会被有效地延迟$\{10\overline{\mathrm{1个}}\mathrm{2个}\}$一粒中有两个变种。同时，与包含单个样品的样品相比，相应样品的屈服应力也得到了增强。$\{10\overline{\mathrm{1个}}\mathrm{2个}\}$ 孪生变体或 $\{10\overline{\mathrm{1个}}\mathrm{2个}\}$一粒双胞胎。根据这些实验特征，提出并讨论了这种现象背后的可能原因。