Like some have said that's an oldie but a goodie. As stated it was offered in the E46 M3.
If you've seen the thread, approximately 50% of E92 owners [on here] had E46 M3s.
Already, most of that half did not want the same trim again. To me, this is why carbon leather is so popular. It's new to M3s (and it looks nice). You will like the Titanium trim though and it will look good in the sun with a vert - whereas the carbon will look cheap and dated over time (plus possible drying cracking in the sun).
Congratulations and enjoy the car.