Duplicate tag

With WP 3.7.1 I get this HTML code on my installation:

<meta charset="UTF-8">
<title>Luigi Ros</title>
<link rel="profile" href="https://gmpg.org/xfn/11">
<link rel="pingback" href="https://luigirosa.com/xmlrpc.php">

<meta charset="UTF-8" />
<title>Luigi Rosa</title>

The first <title> is in the line 5 of header.php (note that for unknown reasons the last character is missing):

<title><?php wp_title(); ?></title>

The second (correct) <title> come from line 9:

<?php wp_head(); ?>

Since wp_head() already sends <title> I think that the <title> in line 5 of header.php could be deleted.