采用电子束焊接对10mm TA12钛合金进行了焊接,焊缝表面形成良好。对TA12钛合金电子束焊接试样进行了金相分析和静力试验、冲击试验和扫描电镜(SEM)分析。结果表明,焊接接头熔合区、热影响区和母材区的微观组织差别明显;随着等轴α相体积分数的减少,接头塑性和冲击韧性值降低,但是拉伸强度变化不大。 Electron beam welding was used to weld 10mm TA12 titanium alloy and the weld surface formed well. Metallographic analysis, static test, impact test and scanning electron microscopy (SEM) analysis were carried out on TA12 titanium alloy electron beam welded samples. The results show that the microstructure of weld zone has obvious difference in the fusion zone, heat affected zone and base metal zone. The plasticity and impact toughness of the joint decrease with the decrease of the volume fraction of the equiaxed α phase, but the tensile strength does not change much.