@engineering.universe on Instagram: "Absolutely beautiful! Titanium anodizing uses electricity to grow a thin, transparent oxide layer on the metal. The layer’s thickness—controlled by voltage—creates color by bending and reflecting light, not by paint or pigment. The titanium stays silver underneath, so colors don’t fade and can be precisely repeated with the same voltage. The electrolyte doesn’t add color; it just carries current. Even a simple baking soda and water mix works for basic anodizi