The surface textured process is performed by nanosecond laser processing technology for TC4(Ti6Al4V),a special titanium alloy material commonly used in industry,and the surface morphology construction and surface wettability transformation mechanism are analyzed by varying the laser scan spacing.The surface microstructure and elemental phase composition changes are analyzed by scanning electron microscopy and energy spectrometry,and the hydrophobic properties of the surface are characterized by contact angle measurement.The results show that the surface hydrophilicity of the material increases dramatically after the laser textured process.After a period of exposure to air,it gradually changes to hydrophobicity and stabilizes,with a maximum contact angle of 139.92°for the surface processed at a scan spacing of 60μm,where the significant multi level micro nano structure of its surface distribution plays a key role.