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Anodising a pattern in Titanium in multiple block colours is quite easy because anodising Ti is done entirely with voltage and no dye.
I've seen it done where they anodise the whole frame, then mask off the pattern with a vinyl graphic, sandblast the areas where the second colour is and then re-anodise the whole lot. The second pass of anodising will only effect the sandblasted exposed area.
in my mind it involves cad work, so no surprise this it comes out much more expensive than a single color anodising