To remain competitive your organisation must be efficient across the business process spectrum. To do so you need to take sound decisions based on a balance between the cost and risk. To do so you will be heavily dependent on your content management in itself needs...
Go to Site Setting - > Site Actions - > Manage site features.
Step 1: Deactivate & Activate SharePoint Server Publishing feature After Creating a Site Using Template. You will see that your default Master Page is Applied.