Hello Everyone

I have a joomla 2.5 website with more than 800 articles. I use Pagination with 10 articles in a page. so 80 Different Pages in the front page layout has the same title tag. so in Google webmaster tools it is showing it as duplicate content. I heard i should use rel=canonical tag to avoid it. But i don't know how to use it in joomla sites. Can any one help me please.