Advances in additive manufacturing have facilitated the production of intricate geometries and customized components with high precision. This research focuses on the optimization of 3D printing parameters for H13 tool steel and Inconel powder using the InssTek MX-Mini metal 3D printer. Key parameters, including scanning speed and powder granulation, are systematically varied to assess their influence on print quality, while the laser power remains constant. The objective is to identify the optimal parameter combinations that enhance dimensional accuracy, reduce porosity, and achieve the desired hardness and tolerance levels in the printed specimens. An extended experimental analysis, using Design of Experiments (DOE), is conducted to evaluate the mechanical properties and microstructural characteristics of the printed parts. The findings provide essential insights into the correlation between the printing parameters and the overall performance and reliability of H13 and Inconel components produced via additive manufacturing. This study offers a valuable framework for manufacturers seeking to optimize 3D printing processes for high-quality H13 and Inconel applications.