Titanium vs Ceramic Hair Straightener?

Which one is better? I have always heard you should always get a ceramic straightener but lately I have been seeing a lot of titanium ones. Which is better? Does the titanium last longer? Any ladies who have had one or the other or both please comment!
Update: I have read that ceramic on hair straighteners come off and then it's really bad for your hair, but this doesn't happen with titanium does it?
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