<p>Introducing bio-inspired micro-textures on cutting tools can significantly improve the lubrication between the rake face of the cutting tools and the chips, and in turn improve the tool life. The size effect and laser scanning time on the wettability of the micro-textured cemented carbide surface with honeycomb-like micro-textures are investigated through theory calculation and experimental study. The WCA on the micro-textured cemented carbide surface is bigger than that of the intrinsic surface when the laser scanning time is 1. When the laser scanning time is 3 and 5, the water droplets can fully spread on the surface. Based on the experimental results, a gradient wetting surface is designed and fabricated. And the water droplets’ delivery performance is verified. By adjusting the density of the micro-textures on the cemented carbides, directional cutting fluid delivery can be achieved. This may benefit the cutting performance and life of the cutting tools.</p>