Removable partial denture (RPD) frameworks have been traditionally produced with the lost-wax casting technique, although the process is complex because the metal is melted at around 1400 C and the emission of toxic gasses requires a rigorous safety protocol. 1 The accuracy and reliability of RPD framework production can be problematic. 2 In the past 20 years, digital technologies have improved in accuracy, reliability, and repeatability, and currently computer-aided design and computer-aided manufacturing (CAD-CAM), including selective laser melting (SLM), plays an important role in the production of dental prostheses. [3][4][5] SLM 3D printers are used to fabricate metal crowns, copings, and fixed partial denture frameworks, which are typically small components that are not severely deformed by residual heat stress. 6 The deformation of prostheses between the casting and SLM processes has been compared. However, deformation of larger RPD frameworks made by SLM has been described, with physical distortion and bending being observed, a deformation that originates from the residual heat stress caused by thermal expansion of the metal during the laser melting process. 7 Therefore, heat treatment after processing is essential to release the residual heat stress from the 3D-printed metal parts. This process influences the mechanical properties of the metal specimens, and therefore, the method of heat treatment Supported by the Ministry of Trade, Industry and Energy (MOTIE, Korea) (grant number 20001221).