Oracle 11gR2 (11.2.0.4) RMAN cold backup | Media recovery
SHUTDOWN


  IMMEDIATE
  
  Does not wait for current calls to complete or users to disconnect
  from the database.
  
  Further connects are prohibited. The database is closed and
  dismounted. The instance is shutdown and no instance recovery is
  required on the next database startup.


SHUTDOWN


  ABORT
  
  Performs an inconsistent shutdown of the target instance, with
  the following consequences:
  
  All current client SQL statements are
  immediately terminated.
  
  Uncommitted transactions are not rolled back until next startup.
  
  All connected users are disconnected.
  
  Instance recovery is performed on the database at next startup.
  
  IMMEDIATE
  
  Performs an immediate, consistent shutdown of the target
  database, with the following consequences: 
  
  Current client SQL statements being processed by the database are allowed to complete.
  
  Uncommitted transactions are rolled back.
  
  All connected users are disconnected.


A cold backup is consistent already, requires no further recovery. All you need to do is open the restored database with:

alter database open resetlogs;


You will have your database as it existed when you took the cold backup. If you need a state newer than that, only then you need to recover further the restored database.