Dear Anestis Gourgiotis ,

please go to the page of your publication at click on the 'more' button, which is just right of the blue 'Share' button.

A drop down menue will open and at the bottom line you will find the edit button; please click onto this button.

Now you are able to edit the title ...

Do not forget to 'save' the changes you have made.

You may also have a look at:

https://help.researchgate.net/hc/en-us/articles/14293081125777-Reviewing-editing-and-featuring-your-research

Please scroll down to the chapter 'How do I edit my research item's details?' and follow the instrctions...

Good luck and

Best regards

G.M.