The effect of titanium on the microstructure, the texture, and the mechanical properties of as-extruded Mg–Sn alloy has been investigated in the present work. The result reveals that the alloy subjected to the optimized extrusion process shows an extremely refined microstructure with an average grain size of 1.7 μm. Meanwhile, the addition of titanium has an obvious effect on intensifying the basal texture where the basal slip cannot be easily activated during tensile testing. As a result, the alloy shows excellent mechanical properties where yield strength and elongation are 200 MPa and 30.2%, respectively. The enhanced yield strength of the alloy can be attributed to the extremely refined microstructure and the intensified basal texture, while the improved elongation of the alloy can be explained by the ultra-fine-grained microstructure through reducing the critical resolved shear stress that favors the prismatic slip activity to accommodate the basal slip.

在目前的工作中，已经研究了钛对挤压态的Mg-Sn合金的组织，织构和力学性能的影响。结果表明，经过优化挤压工艺的合金显示出极其细化的微观结构，平均晶粒尺寸为1.7μm。同时，钛的添加对增强基础纹理具有明显的作用，在拉伸试验中，基础滑动不容易被激活。结果，该合金显示出优异的机械性能，其中屈服强度和伸长率分别为200MPa和30.2％。合金屈服强度的提高可归因于极其精细的组织和增强的基础组织，