The deformation behaviour of a metastable β Ti-10V-2Fe-3Al (wt%) alloy containing ~10 vol% α phase was investigated via single-peak fitting and Rietveld refinement of in-situ neutron diffraction data collected during uniaxial tension. The formation of the ${〈021〉}_{\mathrm{\alpha }″}$ fibre is related to martensite variant selection during β → α″ transformation under applied load. The β lattice parameter increases by ~0.08% during tension whereas α″ accommodates deformation through a decrease and increase in a and b lattice parameters, respectively. The origin of the variation in α″ martensite lattice parameters with strain for different Ti alloys is linked to their different rhombicity values.

通过单峰拟合和在单轴拉伸过程中收集的原位中子衍射数据的Rietveld改进，研究了含约10％（体积）α相的亚稳态βTi-10V-2Fe-3Al（wt％）合金的变形行为。的形成${〈021〉}_{\mathrm{\alpha }\text{'}\text{'}}$纤维与外加载荷下β→α''转变过程中的马氏体变体选择有关。在拉伸过程中，β晶格参数增加〜0.08％，而α''通过分别减小和增大a和b晶格参数来适应变形。不同Ti合金的α”马氏体晶格参数随应变变化的起源与它们不同的菱形度值有关。