Anodizing aluminium and titanium

I mentioned some plans to anodize titanium parts on my own. After today's paper, I rushed some readings and I worked out the setup needed for anodizing aluminium and titanium. And I more or less know the required voltages, current and acid concentrations. Now I just need to buy some 12 gauge aluminium wire, battery acid and anodizing dye (for aluminium). I have to shop for a good rotary tool for my Ergolever tuning project, anyway. I guess I'll be reduced to bread and water for this month... D:

Anyway, I planned to write a more complete tutorial, but my time's limited for today. Maybe I'll leave it for next time when I've actually carried it out. Until then, I'll just provide the scan of my rough working:

Evidently, I'm not good at neat drafts.

The interesting principle of research is always to come up with better ideas than before. Applying that, I wonder if there's an easier way to anodize titanium to the gold part of the color spectrum without applying high voltages.