Base accordions on nid's instead of titles?

I am faced with an instance where there are multiple nodes with identical titles, but with unique nid's. Is there a way to base the accordion off the nid instead of the title, while still keeping the node's title in the accordion bar? I know I can base the Grouping Field off Nid, but then it has the nid in the accordion title instead of the title of the node. Thanks!