Titanium Celtic Rings. Harmonizing with the ebb and flow of nature, these rings bring a sense of calm and tranquility. First, the aircraft grade titanium is cut into the classic Celtic design specified, then the color is added. All colors except the black are anodized into the metal. The black is a thick polymer resin that also holds up well to everyday wear and tear. Finally, they are polished and your ring is ready for shipping.