Which is Better for Tightening the Thighs and Buttocks, ReFirme or Titan?

Neither. I suggest you try Velashape or Vasershape. Thank you for your question and good luck with everything.

In my practice I own four different devices used for skin tightening.  Most devices are designed for skin tightening on the face.  The best devices for body skin tightening are tose that use Radio-Frequency and are 'Mono-Polar'.  The only two devices right now are the Exelis and the latest Thermage CPT.  Having used both of them, the Thermage system is by far the most impressive for this.  I have the Refirme device in my office and it is best used as part of a facial skin tightening regimen.

The weight and stress on the skin in those areas are too severe for these problem areas. Those treatments will only yield a benefit in less stressed areas like the face. Laser or light or radio-frequency therapy are not the correct 'fix' for difficult problems areas. Diet, exercise, and ultimately surgery will achieve the best improvements. I know that is not as exciting or glamorous as a quick treatment but this is reality. Save your money for better more permanent options. Your best solution is a plastic surgeon.
Good Luck,
Michael J. Brown, MD