I own a Remington 700 Ti in 30-06 that I bought last summer. 5# 3 ounces w/o scope & mounts, with a 22" barrel!
The action was "sticky" feeling at the store, but I figured it needed some lube. Wrong. I've tried many lubes, cleaning, polishing the action using JB Bore paste on the bottom of the bolt logs (I did not turn the logs into the recesses). It's still sticky feeling.
I took it to a GS that formerly worked at Remington (I live 15 miles from the now closed Rem factory), he called a friend who formerly worked in the custom shop there & that guy said that Ti galls when in contact with the steel in the bolt. The guy said that was the reason Rem stopped building Ti actions.
Fast forward, I was at a different store recently & they had a 700 Ti in 270 & the action was as slick as 700 Ss actions I have; which are smoooooth! So, I don't know the answer // other than maybe a) living with it (I killed a good buck with it last fall); b) having the bolt coated with something as others have mentioned in earlier posts.
I also listen to the EXO podcast & the guy had a Defiance Ti action custom build in 7mm SAUM that shot well & had sticky issues. He sold it & built a defiance AnTi action for this exact problem. I've emailed him about his sticky issues & he solved it by selling it! I'm not selling unless I maybe buy that 270….