its called backup not titanium install to sd
But if there is a app u don't use every day you can back it up uninstall then just reinstall from the back up(should only take a few sec)
titanium backup should back up apps to the sdcard no problem but if you are talking forcing apps to run off the sdcard with titanium backup then that is a different story. But if you just want to back up your apps and titanium back up isnt working then try app manager by amazing droid it works great and does even require root
I have the free version and got it to save to sdcard with this path ../sdcard2/TitaniumBackup
Hope this helps.
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