Impact of Surface Post-Treatments on the Properties of Additively Manufactured Ti-6242 Alloy Abstract Metal additive manufacturing is an advancing technology enabling the creation of complex parts; however, these parts often exhibit poor surface quality and defects that can negatively impact performance, particularly fatigue and wear resistance. This study investigates the effects of various surface post-treatments—grinding, laser polishing, tumble finishing, and chemical polishing—on Ti-6Al-2Sn-4Zr-2Mo (Ti-6242) parts produced via laser powder bed fusion (L-PBF). Initial work focused on optimizing L-PBF parameters to produce dense, low-defect samples fabricated using a Print Sharp 250 L-PBF machine. Samples were evaluated for density using the Archimedes method and X-ray computed tomography, while surface roughness and quality were assessed.