well then, that sounds very strange and not enough explanation. For example: what was the anion that was present with the titanium (III), oxide?
Still, let's see if we can help you out a little bit to get you to get to the answers for yourself.
For the first one: what does the observed bubbling mean for the product(s)?
For the next ones: can you tell me the colors that titanium oxides have?
(and I have to leave the exact answers for your teacher, because without knowing more about the anions that are present I can only guess as well.)