Yes! You are able to edit titles before they go live for the first time on youtube.
Here's how you can edit them:
Click “Test” on the sidebar and choose Ongoing Tests from the options.
Click on the test you want to change the title for
Scroll down beside the title you want to update and click on the three-dotted line
Click the pencil icon from the options.
Type in the updated title
Then click save changes.