By installing Joomla 1.5 Front page title is set to “Welcome to the front page.” You could change this title following a few steps.

STEP 1.
In the Joomla 1.5 admin panel, go to Menus – Main Menu *

STEP 2.
In the Menu Item Manager [mainmenu] you need to click on Home

STEP 3.
You are now in Front Page Blog Layout-in and you need to Click on the Parameters – System to change the Page Title. By changeing text “Welcome the front page“ with your text you have got a new title to the Home page of your site. If you do not want on your site to show Home page title in the state Show Page Title, select the option No.

STEP 4.
Save settings