<p>A novel micro-emulsion cutting fluid was developed with enhanced focus on stability, cooling efficiency, and lubricating performance, thereby effectively improving the machinability of titanium alloys. The tribological properties of the new micro-emulsion cutting fluid under titanium alloy/cemented carbide contact conditions and its lubricating properties during titanium alloy turning processes were investigated. The experimental results demonstrated that a 15% concentration of the micro-emulsion cutting fluid exhibited the optimal tribological performance with excellent lubrication performance. In addition, the micro-emulsion cutting fluid demonstrates effective lubrication and cooling properties within the cutting process, thus facilitating the synthesis of oxides and impeding the diffusion of elements. The tribological performance of the micro-emulsion cutting fluids is ascribed to the establishment of a protective wear-resistant film on the titanium alloy surface. The mechanisms for friction reduction and wear prevention of micro-emulsion cutting fluids for titanium alloy/cemented carbide friction pairs are primarily the result of chemical films.</p>