ennoblize

verb2

1. •
   (rare) To ennoble.

   • Hee Britaine shall ennoblize with his witt, — 1966
2. •
   (rare) To protect (a metal) from oxidation.

   • A more recent innovation utilizes small patches applied directly to the titanium base metal surrounding the crevice in order to ennoblize the occluded titanium within the crevice. — 2011