Vacuum nitriding  
GOLD/BLUE/BLACK ,all adopt the vacuum ammonia infiltration coloring process, the color penetrates into the metal surface, the color is bright and durable.It will not fade easily with non-strong scratches.

Anodizing Candy color/green/purple, with anodized coloring process, providing more dreamy options.

Pure titanium: low strength and low price. It is suitable for equipment that does not require strength and only meets anti-corrosion requirements
Recovery/secondary smelting titanium: inferior quality, low price. There is no security.