This article explores the best materials for 5-axis machining, detailing their properties, machining considerations, and applications. It emphasizes how material choice impacts machining efficiency, tool life, and part quality, covering key materials like aluminum, titanium, stainless steel, Inconel, plastics, and copper/brass. Whether for prototyping or production, understanding these materials ensures optimized use of 5-axis machining capabilities for complex, precise components.