Many Titanium owners have blown Never-Lubes. Glendale installed offset rims on some Ti's. Offsets are a big No-No according to Dexter.
Almost all have been able to replace a complete hub/bearing assembly without having to mess with the axle. Unless you had subsequent damage, I don't understand replacing an axle just because of a bad bearing even if the bearing bushed out the hub. I would personally call Dexter customer service and confirm that a new axle is the only solution.
(I and several other Ti owners completely replaced my Never-Lubes with axles equipped with EZ-Lube bearings, which are serviceable. Dexter had at one time a program for Titanium owners to cover most of the cost of changing out the entire axle setup.)