为了研究磁场搅拌对激光沉积钛合金组织和性能的影响，将自行设计的旋转磁场引入到激光成形系统中，并进行了钛合金沉积成形实验。考察了不同磁场参数下试样的宏观形貌和微观组织，测量了激光沉积层的显微硬度。结果显示：磁场引起激光熔池的强烈对流，使单道沉积层的表面呈现下凹状；且在一定范围内，磁场搅拌速率越快，沉积层α片层组织越细密，硬度越大，可达440 HV0.1。表明旋转磁场加剧了熔池的对流，从而加快了其冷却速度，细化了沉积层内的片层组织，并提高沉积层的力学性能。

To study the effects of magnetic field stirring on the laser metal deposition (LMD) parts, a device of rotating magnetic field is designed and introduced to the LMD processes of titanium alloy. The microstructure of the laser deposition layers is characterized and the deposition layers′ microhardness is tested. The results show that the convection in the laser melting pool caused by magnetic field makes the top cross-section of single pass concave-shaped. With the higher rotating speed of magnetic field, the α lamellar is finer, and the micro-hardness of deposition layers is much harder which can be 440 HV0.1. It indicates that rotating magnetic field intensifies the convection in the pool and increases its cooling speed, which leads to finer microstructures and better mechanical property.