how remove ‘>>’ from the title

Between the title tags in your header.php, replace the code with the following:

For only the blogs title on everypage:
<?php bloginfo('name'); ?>

For the blogs title followed by the post name:
<?php bloginfo('name'); ?> <?php wp_title(); ?>

For something a bit flashier:
<?php bloginfo('name'); ?> <?php if ( is_single() ) { ?> &raquo; Blog Archive <?php } ?> <?php wp_title(); ?>

Hope that helps. 🙂