Gold Anodized

What is it to create Color Anodized metal? ?

i saw a website that sold rings and one type was anodized rings, they were titanium rings that where anodized and thus had certain almost glowing colors asif the metal itself was blue or gold, or whatever color u choose. A. hows it work? B. does the metal become that color all the way threw? like if i cut into it or shaved off a large layer, would the color still be there? C. can it only be done to Titanium? D. does the metal weakin or get stronger? E. if the metal doesnt get weaker, could a sword or dagger or hammer be made Anodized?

http://www.wikihow.com/Color-Titanium
Hope this will gitcha going....

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