Tribological Properties of Femtosecond Laser‐Enabled Microtexturing with High‐Energy Chemical Modification

This study proposes a groundbreaking strategy integrating femtosecond laser microtexturing with chemical modification to address the critical challenges of corrosion, wear, and icing in titanium alloys under extreme environments. A femtosecond laser is used to fabricate the grid microstructure on the surface of TC4, followed by TiO 2 modification through hydrophilic chemical treatment on the sample exhibiting the best friction and wear resistance, aiming to synergistically optimize surface performance. Experimental results indicate that, during the stable friction stage, the coefficient of friction and wear rate of the femtosecond laser‐treated sample T7 are reduced by 86.36% and 89.19%, respectively, compared to the untreated control sample T0. Wettability tests revealed that the contact angle of T0 is 75°, which decreased to 23° for T7 and further dropped to 13° after TiO 2 modification. These findings demonstrate that femtosecond laser microtexturing combined with chemical modification can significantly enhance the wear resistance and wettability of TC4. This multiscale synergistic control mechanism provides an innovative solution for developing adaptive surface engineering in extreme environments, offering fundamental insights for constructing high‐performance surface functionalization systems.