Ti6Al4V alloy can be successfully used to fabricate complex near-net-shape industrial products and prosthetic components with enhanced biocompatibility by means of additive manufacturing (AM) technologies. Post-processing machining of such components are still necessary steps; however, the different machinability that characterizes AM products affect the manufacturing process in a great extent. To this aim, Ti6Al4V cylindrical samples were produced by laser powder bed fusion (LPBF) and micro-holes were machined on their surfaces by varying the cutting speed and feed per tooth, using both vibration-assisted drilling (VAD) and conventional drilling (CD). The drilled holes were comprehensively characterized in terms of geometrical, dimensional and outer edge quality, surface roughness, surface defects and microstructure. In general, VAD was found to improve the overall quality of the holes, regardless the cutting parameters applied thanks easier evacuation of the chips as well as enhanced material flow. To find the optimize process parameters conditions, all the characterization outcomes were combined in a global quality index (${\mathcal{Q}}_i$). The highest cutting speed, the lowest feed per tooth and the use of VAD undoubtedly leads to the formation of the holes characterized by the best surface quality. The improvement given by VAD with the respect of the corresponding CD operation is found equal to 65%. These findings confirm the effectiveness of using VAD when approaching difficult to cut materials such as titanium alloys produced by LPBF.

Ti6Al4V合金可以通过增材制造（AM）技术成功地用于制造具有增强的生物相容性的复杂的近净形工业产品和修复部件。此类零件的后加工仍然是必不可少的步骤。但是，表征AM产品的不同可加工性在很大程度上影响了制造过程。为此，通过激光粉末床熔合（LPBF）生产了Ti6Al4V圆柱样品，并通过振动辅助钻孔（VAD）和常规钻孔（CD）通过改变切削速度和每齿进给量在其表面上加工了微孔。 ）。根据几何形状，尺寸和外边缘质量，表面粗糙度，表面缺陷和微观结构对钻孔进行了全面表征。一般来说，发现VAD可以提高孔的整体质量，而不必考虑切削参数的使用，这要归功于切屑的疏散以及增强的材料流动性。为了找到最佳的工艺参数条件，将所有表征结果组合到一个全局质量指标中（${\mathcal{问}}_{\mathrm{一世}}$）。最高的切削速度，最低的每齿进给量和使用VAD无疑会导致形成具有最佳表面质量的孔。发现VAD在相应CD操作方面的改进等于65％。这些发现证实了在接近难切削的材料（例如由LPBF生产的钛合金）时使用VAD的有效性。