This feature is available in Enterprise and Ultimate editions.
When you create a story from a template, the item inherits all the details from the template, including title and associated tasks and/or tests.
Option 1: From the Sidebar
Option 2: From the Templates Grid
From the main menu, select Product > Input > Templates.
In the Story Details section, select a template, and then click Generate Story. When the story details page opens, all of the story information will be the same except the story ID.
Edit the new story as necessary. The new story will display in the project's backlog.