Could you give me some more info on what you are trying to achieve? Do you want te time in the title so it is displayed on a screen or in some kind of distributed report?
I'm not sure of a way to put it in the report title as it would then be dynamic and the reports get called by static names.
Here are a couple of options though.
You can append the time to section titles. Here is an example. Note the EST will only be applied if you set the timezone of the report.
Or if you are displaying this on a screen somewhere you could use the new full screen mode in 12.4.10
When in full screen mode the time is displayed in the report header