Titanium plates that heat fast and hold temperature, so you're not making four passes over the same section trying to get it smooth. Titanium moves heat more evenly than ceramic, which is why it's the standard behind the chair for coarse and resistant hair.
Adjustable temperature, so you can run it low on fine or color-treated hair instead of blasting everything at max.
Real Talk from Amanda: Titanium is fast, and fast is how people damage their hair. Start at the lowest setting that actually works and go up only if you need to. If you're blonde or bond-treated, please don't run this at 450. I'd rather you take an extra pass than lose length.