Hi Emanuel,
I don't know for sure about interchanging the cogs in your case since I have never used a Titania body but wanted to tell you that I have successfully "repaired" or at least "made useable" a mangled two prong Regina body.
I used a dremel tool to enlarge the two prong slots, equally on both sides with the result being an oversized slot with renewed square shoulders on each side of the slot.
The resulting two prong openings are larger than original but if you square up the "shoulders" of the two prong slots the Regina freewheel tool (or the two prong Suntour tool will work) although "sloppily" to remove the freewheel a few more times.
Make sure you "clamp" the freewheel removing tool to the freewheel with a quick release of a bolt and nut for the initial loosening....
Good luck!
Nick Ozerov
Boulder Construction L.L.C,
San Antonio, Texas, USA
210-490-8818
nozerov@satx.rr.com
Make it better than it has to be!