I consider a Ti bike to be what you get if you want a classic “forever” bike. Things like the dropped chain stays, d-shaped seatposts, sub-1000g farmes weight and aero tubing are just really hard to do in Ti, but Ti has asthetics and ride quality attributes that you aren’t likely to get with carbon.
If you are racing or hunting KOMs, then go carbon. If you want craftsmanship, durability and/or custom geometry Ti is a much better option.