Type II: Type 2 anodizing penetrates the titanium rather than building up at the surface, providing an anti-galling surface. This effect may reduce the complications related to the removal of trauma implants (e. g. bone nails and -screws). Anodizing also provides excellent surface prep for dry film lubricants, paints, etc.
Type III: Type 3 anodizing produces a spectrum of surface colors on titanium but does not offer anti-galling or wear resistance properties. Titanium anodizing is used extensively in orthopedics when it is desired to “color code” or otherwise identify implants.