Since you're on this forum, your foot is in the door. Make sure your Titleist profile is complete and you may be selected to test products based on your profile preferences.

Best way is to be an active responsible member of the TT community.

Generally, the most likely testing is for balls as they can be widely distributed at a relatively affordable cost. Having a complete profile in the system is very important to getting a random test pack. Even then, there are many more eligible TT members so odds are not greatly in anyone's favor. Attending major events like the Team Titleist Invitational sometimes includes advance release test balls for participants and even early looks at new clubs before they hit the open market. Any additional testing is solely at the discretion of Titleist on a very limited basis and usually subject to geographical selections and/or target handicap performance considerations. Hope this adequately answers your question.

The last time I saw an opt-in was inside the profile under preferences...

Also, by attending the Team Titleist Invitational (Naitonal Event) you will be able to see, hit and sometimes take with you items that are in beta testing like balls etc...

Cheers!

Thank you for the advice everyone. I remember there were a couple of years where I would get the surprise white sleeve of balls but that has been around 7-8 years now.

Stay active in the forum......and hope.

Completely agree with all the comments. Be active in TT and they will take care of you.

Stay active on the TT forum and a completed profile.

I once received a sleeve of test balls, but as others have said, attending TT events are the best way to test products.

Titleist does have a testing program not related to Team Titleist.
You have to be local to one of the testing sites.

Cheers,
Dr. K

As the others have said, be active here (and on FB) and keep your profile updated.

Remain active on the forums