Avoiding Titanium at all costs is something that gets tossed around on the inter webs without much backing it. There's a lot of theories but not much real world information. Pierce Engineering has been making Ti actions for years. They have come a long way since the beginning.
The biggest issue is Ti is naturally "sticky" and wants to be grabby and function rough. That however is cured when the bolt is DLC coated and DLC coating the action body helps even more. Having an anti-bind rail that keeps the bolt on track inside the receiver helps a lot too. These things are all standard in a Pierce Titanium action. Believe me when I say they function like butter. It's very hard to feel the difference in smoothness when comparing a DLC coated Ti action to a DLC coated stainless action. Most of the feel difference is simply from the weight difference in the steel.
Finally, Titanium actions are said to exhibit pressure signs earlier. The majority of our customers have never had that issue. If you're running within SAAMI pressures you shouldn't have an issue with heavy bolt lift or any other problems. The whole point of titanium is to be light. If you're trying to hot rod a 6lb mountain rifle it's just the wrong application is all. For those that just can't live with titanium or want to save some money, we have something coming very very soon to address that