Yes you can.
Check out this thread:
http://forum.tixati.com/support/239/
1- have a magnet link or torrent file of the torrents you want to transfer
2- start tixati and add the torrents/magnetlinks. be sure to point the torrents to the folder containing the files. do not let them start downloading.
3- the files will probably check so let that happen and when done you are all set to continue seeding your files with tixati.