Hi Mallary,
You could take an Auctiva template and create a Custom template without the title tag. The text to look for and remove is [TITLE].
You could also substitute a line for the description title that's different than the listing title, one that makes sense or even "Welcome to My Listing".
I have a 3rd option you can also test. Using a null (no text) or even standard keystroke blank(s) does appear to cause item title to repeat, but using an HTML space code &nb-sp; (remove hyphen) in the Template Title field does seem to place a single blank in the title field for my tests. That might work OK for some or all templates.
Danno