first, after opening titu did you click the PROBLEM button to download the latest busybox, and make sure you have usb debugging on. And if you are removing apps instead of freezing them, make sure you tap WIPE DATA first than hit uninstall.
but after you check everything, usb debugging and downloading busybox, open titu and click Backup/Restore tab, hit Menu and tap Batch Click Run on Backup all user apps+system data, it might take about 5 minutes or so depending on all the stuff on there. After that has finish plug you phone to the computer via usb and select mount in the notification bar. Scroll down and you will see a folder TitaniumBackup1 open it and make sure you see all your backups in there. Now just copy that folder to your computer and keep it in a safe place....now unmount the phone from the computer after you finish moving the folder and you can delete all the bloatware thats on there...BE CAREFUL AND NOT DELETE ANYYTHING GOOGLE...and remember before you tap uninstall tap Wipe Data first.
Safe to delete: ON MetroPCS
Boingo
Uno
Pocket Express
Youtube
Docs to Go
Free Games
Loopt
Mocospace
Mobile Banking
Mobile IM
Virtual Card
DO NOT DELETE:
Mailmetro
Navigation
Easy Wifi
metro appstore
Nothing thats by google