Abstract: Pure titanium samples were prepared by laser powder bed melting, and the building directions were 0°, 30°,45°, 60° and 90° to the substrate plane, respectively. The microstructure and dry wear/corrosion wear resistance of pure titanium specimens were studied. The results show that with the increase of the angle between the building direction and the substrate plane, the microstructure changes are as follows:the mixed structure of equiaxed grains and acicular-shape martensite α’→ zig-zag and acicular-shaped martensite α’→ slender martensite α’ along the building direction, which results in the decrease of the grain boundary density and the increase of the deviation of Schmidt factor. In the dry wear test, furrow wear and oxidation wear are the main wear mechanisms, while in Hank’s solution, the plastic deformation is the main wear mechanism. Hank’s solution effectively reduces the wear coefficient and high-temperature oxidation, but at the same time it induces the formation of corrosion pits, thereby accelerating wear. Schmitt factor deviation, grain boundary density and average grain anisotropy lead to the wear and corrosion wear anisotropy of pure titanium in additive manufacturing.