The deformation behavior of face-centered cubic (FCC) phase in annealed samples at room temperature was directly observed by Transmission electron microscope (TEM). It is found that FCC phase has excellent capacity of plastic deformation. Under cold-rolling, the FCC/HCP (hexagonal close-packed) phase interface slides and rotates, leading to deviation from the semi-coherent orientation relationship. The FCC phase has undergone various deformation modes such as shearing, bending, kinking and their combinations. With the increase of strain, the globularization of FCC phase is more remarkable, and bands are transformed into equiaxed grains. Kinking of FCC band structure under cold-rolling was first discovered in this work, which can lead to grain refinement and improve ductility. The globularization behavior of FCC phase is similar to that of α/β lamellar starting structure in titanium alloy at high temperature. This provides a new idea for the design of microstructure and properties of titanium and its alloys.

通过透射电子显微镜（TEM）直接观察室温下退火样品中面心立方（FCC）相的变形行为。发现FCC相具有优异的塑性变形能力。在冷轧下，FCC / HCP（六方密堆积）相界面会滑动并旋转，从而导致偏离半相干取向关系。FCC相经历了各种变形模式，例如剪切，弯曲，扭结及其组合。随着应变的增加，FCC相的球状化更加明显，并且带转变为等轴晶。在这项工作中，首先发现了FCC带在冷轧时的弯曲，这可以导致晶粒细化并提高延展性。在高温下，FCC相的球化行为与α/β层状起始结构在钛合金中的相似。这为钛及其合金的微观结构和性能设计提供了新思路。