ceramic or titanium?

today in school we were learning what the difference between titanium flat irons and ceramic are. also the difference between store bought flat irons and professional grade irons. i learned alot that i wouldnt have even thought of. i have used a titanium iron before and i loved it on my own hair but i had no idea there was so much difference from one iron to another. in the end ive decided the titanium irons are my favorite but i still love my ceramic chi :)