[DeborahRome]

An update to an old thread (Remove Authors Name From Converted Titles, 2018):
I too like saving my titles as "author - title", and was irritated by Calibre adding author's name again at the end. I discovered a simple tweek in Preferences that does the trick:
Click on Preferences on Menu bar at top of screen
under Import/Export click on Saving Books to Disk
in Save template section, change default
{author_sort}/{title}/{title} - {authors}
by deleting the second " - {authors}" so that it reads
{author_sort}/{title}/{title}
and click on Apply

You may need to repeat this if you download an updated version of Calibre.