Hi Nikhil,
You need to use the user exit for creating the automatic TO for partial TR, we have an option to select the automatic TO creation for TR using user exit (see details in the below link) in the below step.
IMG-> WM-> Activities-> Transfers-> Set up automatic TO creation for TR, then select the control data.
In the conrol data, refer additional criteria check box and selection criteria field, for more details about this setting please refer below link
http://help.sap.com/saphelp_40b/helpdata/en/7f/1939516e36d1118b3f0060b03ca329/content.htm
Regards
Vijay