Titanium Matrix Composites (TMCs) are widely used in aerospace because of their excellent mechanical properties, but it is accompanied by the difficulty of machining. Ultrasonic Vibration Assisted Drilling (UVAD) can effectively reduce the axial force in the drilling process and improve the integrity of machined surface. In this paper, the discontinuous titanium matrix composite TiBw/TC4 was developed by preparation method of in situ. In order to obtain the machining parameters of TiBw/TC4 and guide the application of UVAD in TiBw/TC4, the contrast experiments between conventional drilling (CD) and UVAD were carried out to analyze the variation law of axial force. In this experiment, the frequency and amplitude of ultrasonic vibration were set as 35 kHz and 2.5 μm respectively, and the drilling conditions were that the spindle speed was (1500/1600/1700/1800/1900) r/min and the feed speed was (6/7/8/9/10) mm/min. The surface integrity of hole wall such as roughness, residual stress and white layer was discussed. The experimental results show that the yield strength of TiBw/TC4 developed by in situ is 51% higher than that of pure TC4. Compared with CD, the axial force of TiBw/TC4 in UVAD is significantly reduced, and the formation of continuous chips and winding cutters is effectively reduced. Besides, the wear rate of the cutters is reduced. The number and size of hole wall defects, such as scratches, delamination and tearing, are obviously reduced. As well as the residual stress, white layer thickness and hole wall roughness are reduced by 4.67–16.31%, 42.48% and 5.98–29.27% respectively. Within the limits of the experiment, when the spindle speed is 1700 r/min and the feed speed is 8 mm/min, UVAD can obtain better hole wall surface integrity parameters.

钛基复合材料（TMC）由于其优异的机械性能而广泛用于航空航天，但伴随着机械加工的困难。超声波振动辅助钻孔（UVAD）可以有效地降低钻孔过程中的轴向力，并改善加工表面的完整性。本文采用原位制备方法研制了不连续的钛基复合材料TiBw / TC4。为了获得TiBw / TC4的加工参数，并指导UVAD在TiBw / TC4中的应用，进行了常规钻孔（CD）和UVAD的对比实验，分析了轴向力的变化规律。在本实验中，超声振动的频率和幅度分别设置为35 kHz和2.5μm，钻孔条件为主轴转速为（1500/1600/1700/1800/1900）r / min，进给速度为（6/7/8/9/10）mm / min。讨论了孔壁的表面完整性，如粗糙度，残余应力和白层。实验结果表明，原位生成的TiBw / TC4的屈服强度比纯TC4高51％。与CD相比，UVAD中TiBw / TC4的轴向力显着降低，有效减少了连续切屑和绕线刀的形成。此外，减少了刀具的磨损率。明显减少了划痕，分层和撕裂等孔壁缺陷的数量和大小。除残余应力外，白层厚度和孔壁粗糙度分别降低了4.67–16.31％，42.48％和5.98–29.27％。