The Types taxonomy of metal dental flasks distinguishes four alloy families, each with distinct sub‑grades that influence cost structure and performance. Stainless steel flasks, split into high‑grade and surgical‑grade variants, represent the most cost‑effective option and serve the majority of routine laboratory work. Nickel‑Titanium flasks, prized for shape memory and superelasticity, are employed in applications demanding precise fit and rapid cooling, particularly in implant frameworks. Titanium flasks, offered in pure and alloyed forms, provide the highest biocompatibility and are reserved for premium prosthetic solutions where weight reduction is essential. Copper‑Nickel flasks, with enhanced thermal conductivity, are selected for high‑volume casting where rapid heat dissipation improves cycle times. This market taxonomy clarifies how each type contributes to overall demand, with stainless steel leading in volume, while nickel‑titanium and titanium capture niche, higher‑margin segments.