The present study evaluates the influence of acetone vapor and heat treatment on the mechanical propertiesMechanical properties and aesthetic finish of ABS specimens produced by additive manufacturingAdditive manufacturing via FDM (Fused Deposition Modeling). This study involves exposing groups of samples to thermal conditions at 110 ºC for periods of 1 and 2 h, with these groups divided into two types: groups without acetone exposure (T1 and T2) and groups with acetone exposure (T1A and T2A). The T1A and T2A samples were first subjected to heat treatment, followed by 1 h of exposure to acetone vapor. Subsequently, the samples underwent mechanical tests for tensile, compression and impact strength, respectively, according to the ASTM D638-22, ASTM D695-23, and ASTM D256-23 standards. The tensile tests of samples TT0 (without thermal exposure), TT1, and TT2 revealed tensile strengths of 36.7, 38.99, and 37.78 MPa, respectively, and Young’s moduli of 0.822, 0.768, and 0.732 GPa.