Hi Ayan,
Thanks for reaching out! This is actually the expected behavior for recurring events. The event info, such as the title and description, will be the same across all events in the series. You can however break events from the series, and then you will be able to edit each event individually.
Another option to accomplish what you are looking for would be to create an event and then use a plugin like Post Duplicator to make copies of it. You could then edit the date and title to get an event similar to the original without having to re-enter the same information again.
I hope this helps – I know that isn’t the exact answer you were looking for, but unfortunately there isn’t currently a way to have different titles on events in the same series. Sorry for the bad news there!
Please let me know if you have any questions!
Thanks,
Jennifer