Here is a research project:
Titanium has a characteristic that may need explaining. When an electrical current is passed through a sheet of titanium the material will change color. Depending upon how long the current is passed through the material the color will deepen. Depending upon the level of the current/voltage the color will vary. In this way,you can actually "paint" pictures on a sheet of titanium. There is a company in the UK that does this and the pictures that they make are fantastic. Here is a contact point however it may have changed as this info is twelve years old.
Stow Green Supplies
Stow-On-The-Wold
Gloucstershire
0451-30998
It is my understanding that there is a museum in either Spain or Portugal that is constructed entirely from titanium. Can you imagine what would happen if it were struck by lightning?
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The Cat