Surface drag resistance would cause energy waste in transportation industrials and vascular stenosis in biomedicine field, which is still an urgent problem to be solved. Selecting widely used Ti-6Al-4V (TC4) alloy as research object, the grid-shape micro-nano structure was fabricated on the surface by laser micro-scanning, and the superhydrophobicity with low adhesion was achieved after further chemically modified to lower the surface free energy. The change of the wettability in this process indicated that the superhydrophobicity was ascribed to a combination of the micro-nano structure and chemical composition. The bounce behavior was analyzed by obtaining the trajectory of water droplet via image processing, and the rebound coefficient was maintained at about 0.85, which fully verified the superhydrophobicity. The prepared superhydrophobic surface shows enough stability after the abrasion tests, soaking tests, and water impinge tests. The slip length, which indicates the drag reduction capability, was measured based on torque measurements with various shear rates. The prepared superhydrophobic TC4 alloy surface reduced drag effectively, yielding slip lengths of 17 μm with pure water and 40 μm with 30% glycerin-water solution, respectively. It is worth believing that this laser-based method would show great application potential in the fields of transportation and biomedicine, necessary condition to achieving superhydrophobicity.

表面抗阻力将导致交通运输行业的能源浪费和生物医学领域的血管狭窄，这仍然是亟待解决的问题。以广泛使用的Ti-6Al-4V（TC4）合金为研究对象，通过激光微扫描在表面形成网格状的微纳米结构，进一步进行化学改性以降低其表面形貌可实现低附着力的超疏水性。表面自由能。在该过程中润湿性的变化表明超疏水性归因于微纳米结构和化学组成的结合。通过图像处理获得水滴的轨迹来分析​​反弹行为，并将反弹系数保持在约0.85，这充分证明了超疏水性。制备的超疏水表面在耐磨性测试，均热测试和水冲击测试后显示出足够的稳定性。表示减阻能力的滑移长度是基于各种剪切速率下的扭矩测量结果而测得的。所制备的超疏水TC4合金表面有效地降低了阻力，在纯净水中产生的滑动长度分别为17μm，在30％甘油水溶液中产生的滑动长度分别为40μm。值得相信的是，这种基于激光的方法将在运输和生物医学领域显示出巨大的应用潜力，这是实现超疏水性的​​必要条件。所制备的超疏水TC4合金表面有效地降低了阻力，在纯净水中产生的滑动长度分别为17μm，在30％甘油水溶液中产生的滑动长度分别为40μm。值得相信的是，这种基于激光的方法将在运输和生物医学领域显示出巨大的应用潜力，这是实现超疏水性的​​必要条件。所制备的超疏水TC4合金表面有效地降低了阻力，在纯净水中产生的滑动长度分别为17μm，在30％甘油水溶液中产生的滑动长度分别为40μm。值得相信的是，这种基于激光的方法将在运输和生物医学领域显示出巨大的应用潜力，这是实现超疏水性的​​必要条件。