Titanium straightening irons are the best quality of metal irons on the market. Titanium is much better because it's really light in weight, and also heats up very quickly. Titanium is much like tourmaline because it generates heat using negative ions, which means you don't need it to be as hot to be able to keep your hair straight. Hair straighteners like this can be used at lower temperatures compared to the older style ceramic or metal options. If you choose to opt for titanium, keep in mind they are extremely efficient as far as heat is concerned, so if you have hair that's easily damaged it's really worth keeping this in mind.