This could be a new feature for tixati. What do you think about it?

It's possible by using Remove button from top menu.

Be careful with the remove and delete functions and always have Tixati make a copy of the torrent (parameter in the settings.)  When you remove or delete it is gone before you get a confirmation request.  They did implement an ability to restore that last removed torrent, but you are s.o.l. if you accidentally deleted it and did not send it to the trash. I find it very disconcerting that they do the removal and/or delete immediately before confirmation.

Torrent task is removed from Tixati immediately after hitting Remove, but then Tixati displays Confirm File Delete window, where you decide what you want to do with the data. Tixati doesn't delete data without confirmation.

I apologize, that was my mistake to make the statement phrased that way. Yes, there is confirmation before delete of the file.