Titanium Anodizing Voltage & Color Explorer
Slide the anodizing voltage and see the approximate interference color on titanium, with the typical voltage range for each color band.
Titanium anodizing colors are interference colors: the applied voltage sets the oxide film thickness, and the film thickness decides which color you see. Use this explorer to pick an approximate target voltage, then confirm the color on a test coupon from the same material lot.
All color bands — click to jump
Read before you set a voltage
Published charts disagree by up to about 15 V for the same color. Electrolyte, temperature, alloy (CP titanium vs. Ti-6Al-4V), surface finish and lighting all shift the result.
Colors repeat at higher voltages (a second blue and green appear above about 80 V), and a deviation of 2–3 V is already visible.
Always run a test coupon from the same material lot and surface finish before production.
How Voltage Controls Anodized Titanium Color
1. No dye is involved. Anodizing grows a transparent titanium oxide film whose thickness rises with voltage — published data put it in the order of 1.5–3 nm per volt. Light reflected from the oxide surface and from the metal underneath interferes, and the film thickness decides the color.
2. The color sequence is consistent; the voltages are not. With rising voltage the colors run from bronze through purple and blue to gold, rose, violet, teal and green. Different charts place the same color up to about 15 V apart, because electrolyte, temperature, alloy and surface finish all shift the result.
3. Finish first, then anodize. Bead-blasted or stonewashed surfaces give a matte color, ground or polished surfaces a brighter one, and rough surfaces can color unevenly. The mechanical finish cannot be changed after anodizing without removing the oxide.
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