2D forging processes are adopted to tailor the microstructures and mechanical properties of near α titanium alloys with different boron contents and the evolutions of the microstructures and mechanical properties of the acquired alloys are carefully characterised. Maximum texture intensities decrease with increasing boron contents, thereby illustrating the improvements in the homogeneity of the microstructures. The distribution of TiB whiskers in the 3D space exhibits a near-columnar arrangement around boundaries of squashed and elongated prior β grains along the stretching direction. Increases in the contents of equiaxed α grains with increasing TiB contents are ascribed to enhancements in recrystallisation due to the promotion effects of the TiB phase and increases in β transus temperatures. Boron exhibits excellent refinement effects on the alloy matrices, and the refinement degree increases with increasing boron contents. The proportions of low-angle grain boundaries decrease whilst the corresponding proportions of high-angle grain boundaries increase with increasing boron contents. The ultimate and yield strengths of the alloys increase at room temperature (RT) and 650 °C. Elongations exhibit a decreasing trend at RT but are maintained at 650 °C. At RT, cleavage fractures of the TiB whiskers determine the evolution law of elongation. The fracture characteristics of alloy matrices exhibit a transformation from a mixture of tearing lamellae and dimples to dimples only. At 650 °C, the alloy matrices are characterised by ductile fractures with numerous dimples. Er containing particles facilitate the fracture of alloy through cooperative effects with TiB whiskers.

采用二维锻造工艺来定制不同硼含量的近α钛合金的组织和力学性能，并仔细表征了所得合金的组织和力学性能的演变。最大织构强度随硼含量的增加而降低，从而说明了微观结构均匀性的提高。TiB晶须在3D空间中的分布在沿拉伸方向挤压的和伸长的先前β晶粒的边界周围表现出近柱状排列。随着TiB含量的增加，等轴α晶粒含量的增加归因于TiB相的促进作用和β转变温度的升高，导致了再结晶的增强。硼对合金基体具有优良的细化效果，且细化度随硼含量的增加而增加。随着硼含量的增加，低角度晶界的比例减小，而相应的高角度晶界的比例增大。合金的极限强度和屈服强度在室温（RT）和650°C下会增加。伸长率在室温下表现出下降的趋势，但保持在650°C。在室温下，TiB晶须的断裂断裂决定了伸长率的演变规律。合金基体的断裂特性表现为从撕裂的薄片和凹痕的混合物转变为仅凹痕。在650°C时，合金基体的特征是具有许多凹坑的延性断裂。