Anodizing is an electrochemical process some jewelers use to change the color of metals such as titanium, aluminum, and niobium. Dipping a reactive metal into a "bath" mixture of low-sudsing detergent ...

Here’s a fun video showing the rainbow of colors that anodized titanium can become. There are blues and purples and gold and it all changes so fast. It’s basically magic (or science!) that just ...

My anodized-titanium card case is deep blue when I hold it normal to my line of vision. But rotating the case changes its color, eventually reaching a nice shade of violet. Why does the object change ...