I had my first ever Titleist fitting for irons a week ago. I am now anxiously waiting on my new irons to arrive. I would say be honest about what your skill level is, what you are looking for in your new irons, and what your preferences are once you start hitting them in regards to feel, look, and performance. Keeping an open mind is key as well. Also, be sure to stop, listen, and take in all the information the fitter is giving you during the fitting. Above all else pace yourself when you start hitting. I hope you get as much out of your fitting as I did mine. I felt it was so worth it I just completed another Titleist fitting yesterday for a driver and fairway wood. Which are now on order. Good luck but most of all enjoy the experience.

Well, bring your whole bag. Think about what you like or don't like with your current set. The fitter will have you hit your irons to look where your launch and descent angle degrade. That is close to the point where a mixed set may come into the discussion. In any event, listen and if the answer/recommendation is not clear to you, let them rephrase it. If the fitter doesn't tell you what the head or shaft is, ...don't look at it. That will let bias slip into how you expect to hit it.

My fitter asked me several questions so I really didn't need to ask many. Just let them know what your golfing goals are and what you need help with. My main advice would be leave your ego at home. Many of us think we need equipment that is above our skill level. I honestly thought I would be choosing between the T150 and T200. I bought the T350's. Hit them so much better and they will make the game much easier for me. I unfortunately don't hit the middle of the face every time. Being in my early 50's I realized I need irons that will work for me at age 60 also. I normally keep irons 10 years or more. The T350's checked that box for me.

A side note, my sister used to live on Scot Lake in Lakeland. Been there many times. Played Eaglebrooke several times and Grasslands.

Ensure you sinus your iron play in general -- shot shape, effective spin, flight preferences, gapping, shaft issues, etc. --- during the run up to the fitting so the fitter has an idea what may work for you. Be relaxed, ready to hit shots with a variety of irons and shafts, and definitely keep an open mind. Pay attention to the numbers as those will quickly inform you as to what is working best for you. Don't be afraid to consider mixed sets and let the fitter help with gapping. Most of all, enjoy the experience!

"sinus" above is an autocorrect. I actually typed summarize, but you could also review your current play and desires, as opposed to summarizing them.

Biggest factor is let the numbers on the monitor guide you. Then it’s all about feel and how the clubs looks at address. Got my T150’s custom. Best fitting I’ve had

Make sure that you have some warm-ups with your old clubs so the fitter can get a baseline.

Communicate with them the things you may like about current set-up, what you are looking to improve upon, and RELAX.

Trust the fitter and the process, and the results should be exactly what will allow you to play your best and enjoy the game of golf.

Just be patient, as most (including me) don't hit it really well at fittings. I've had many through the years, probably 10+ for irons alone, they're looking at your best shots, trajectory, and curve on normal good shots. When I got my latest 100's, a Korn Ferry guy was there before me, the fitter was just shaking his head....