When purchasing Black Titanium, especially for industrial or architectural use, you must verify the Surface Treatment Method. Most 'Black Titanium' is achieved through PVD (Physical Vapor Deposition) or Anodic Oxidation. PVD is preferred for its superior hardness, scratch resistance, and color uniformity. Ensure the substrate is Grade 2 (Pure Titanium) for corrosion resistance or Grade 5 (Ti-6Al-4V) for high-strength aerospace applications. For decorative sheets, specify the finish such as Mirror, Hairline, or Sandblasted to ensure aesthetic consistency.