Positive and negative polarity combined titanium alloy mixed gas atomization discharge ablation machining method and machined part thereof

The embodiment of the invention relates to a positive and negative polarity combined titanium alloy mixed gas atomization discharge ablation processing method, and belongs to the technical field of titanium alloy material processing. The embodiment of the invention aims to solve the technical problems that tool electrode negative polarity machining is generally adopted in discharge ablation machining in the prior art, the surface of a workpiece subjected to efficient machining is rough, and the subsequent cutting finish machining process is not facilitated. The processing method disclosed by the embodiment of the invention comprises the following steps: S1, a preparation stage: firstly, respectively preparing two mixed gases with the oxygen concentration greater than or equal to 40% and the oxygen concentration less than or equal to 22%, respectively mixing the two mixed gases with a working solution to form two mixed gas atomizing media, and feeding the two mixed gas atomizing media into an interelectrode di