tag title different

Hi,

only in my homepage my title is automatic composed with site title and tag title. But i wouldn’t like that wp generate the site title.

here the page site https://www.made4art.it

<title>MADE4ARTCOMMUNICATION AND ART SERVICES</title</strong>>

	<link rel="alternate" type="application/rss+xml" title="RSS2.0" href="https://www.made4art.it/feed/" />
	<link rel="pingback" href="https://www.made4art.it/xmlrpc.php" />

    <link rel="stylesheet" type="text/css" href="https://fonts.googleapis.com/css?family=PT+Sans" />
	<link rel="stylesheet" type="text/css" href="https://fonts.googleapis.com/css?family=Yanone+Kaffeesatz" />
    <link rel="stylesheet" type="text/css" href="https://www.made4art.it/wp-content/themes/cosmopolitan/style.css" />

   		<link rel="shortcut icon" href="https://www.made4art.it/wp-content/uploads/2012/10/logo-m4a-favicon.jpg" />
 	    <!--[if IE ]><link rel="stylesheet" type="text/css" href="https://www.made4art.it/wp-content/themes/cosmopolitan/css/ie.css" /><![endif]-->

<!-- This site is optimized with the Yoast WordPress SEO plugin v1.2.8.4 - https://yoast.com/wordpress/seo/ -->
<meta name="description" content="Communication - Press Release - Events management - Art Consulting - Training & Creativity"/>
<link rel="canonical" href="https://www.made4art.it/" />
<meta property='og:locale' content='en_us'/>
<meta property='og:title' content='COMMUNICATION AND ART SERVICES'/>

thanks