RMAN incremental restore Can you anyone tell me if it's possible to restore an 11g Oracle database using media management software like Net Backup or Commvault incrementally?

I need to perform a restore of a DB into a new target database (overwriting the DB) ... this of course is fine - connect to the RMAN catalog and then duplicate the DB. However I would then, perhaps 5 days later, like to apply all the incremental changes that occurred on the source to this new target. Is it possible to restore again but only apply the logs from the previous 5 days and roll forward? The new target can be left mounted during this time. It's not being used until all logs are applied. The idea is to save time restoring a massive database before switching over to it permanently. Many thanks.
Sure it is possible. I have done this dozens of times.
It is a simple RESTORE, then a RECOVER phase 5 days later. Or you can even run RECOVER periodically to keep the copy up to date.

Just make sure you do not mess up the catalog with the copy database. Usually I just restore the latest controlfile and use without a catalog connection to prevent RMAN registering restored copies of datafiles in the catalog.

Or use DUPLICATE if you want to use Data Guard as suggested.