Follow the below steps for solving your purpose:
Step 1: Goto your Magento eCommerce website.
System -> Configuration -> General -> Design -> HTML Head for each of the stores.
Step 2: Then, change your Current Configuration Scope and select your second store.
Step 3: Further, uncheck "Use Default" Option and add your Default Title. Then save configration.
Hope this helps you!
Query solved? Accept as Solution.Thanks
Eric Baily