Specialized metallography is the indispensable microscope into the world of additive manufacturing. It unlocks the complex, layered story written into every 3D printed metal part—a story of melt pools, grain growth, and potential defects. By moving beyond standard preparation to techniques that reveal the true as-built structure, and by leveraging advanced imaging and analysis, manufacturers can achieve three critical goals: rigorously qualify their AM processes, scientifically validate the performance and safety of their parts, and drive R&D for next-generation materials and designs. In an industry where internal integrity is paramount, specialized metallography transforms from a supporting technique into a core competency for quality assurance, innovation, and the reliable industrialization of additive manufacturing.