Welcome to the Q&A Forum

No Shailendra is saying you want a 301 rewrite mechanism so that anyone looking for example.html is redirected to example. If you have been using example.html for some time what happens to the guys who have linked to these pages, or any links you have created - they need to be handled by a 301 rewrite.  The snippet of code below placed in your .htaccess should fix.  Take a backup copy first to restore if you hit any problems.

Hi, After changing a title, try to generate sitemap file and submit it to Google through webmaster tools account.  And try to update a sitemap whenever you made any changes to your website. In title, instead of using colon (:) try to use (|) or (-) it will easily understandable by Search Engines. After submitting Sitemap let us again perform some search and check title of your site after 24 hrs, if there are any changes let me know. Thank you.