I can't speak for Dual Blades, but I checked on Titanium Blades;
"This equipment was specially modified or made by AdminPwn on player request in the early Beta days in exchange for credits. This process was soon discontinued as it was time consuming and took away AdminPwn's time to work on the actual game. There is no mention of the feature to ever return, so please do not suggest it. Some of these items are unique items and not available for public use, but some are now available for purchase (Rebellion and Titanium Blades)."
By that statement it's somewhat clear that the Titanium Blades are Credit shop only, unless you find a player who'll sell there's. They aren't loot drops.
"This equipment was specially modified or made by AdminPwn on player request in the early Beta days in exchange for credits. This process was soon discontinued as it was time consuming and took away AdminPwn's time to work on the actual game. There is no mention of the feature to ever return, so please do not suggest it. Some of these items are unique items and not available for public use, but some are now available for purchase (Rebellion and Titanium Blades)."
By that statement it's somewhat clear that the Titanium Blades are Credit shop only, unless you find a player who'll sell there's. They aren't loot drops.

(I recommend using Melee if they want to use this AoB and if someone know take this problem to take the hit's of firearms, please let me know).