How to remove blog name from page title in individual blog posts

Yes. Edit your template, and find this code:

<title><data:blog.pageTitle/></title>

Replace it with

<b:if cond='data:blog.pageType == &quot;item&quot;'>

  <title>

    <data:blog.pageName/> </title>

  <b:else/>

  <title>

    <data:blog.pageTitle/>

  </title>

</b:if>

An alternative code if you want to display the blog title after the post title (in [Page name] | [Blog title] format)

<b:if cond='data:blog.pageType == &quot;item&quot;'>

  <title>

    <data:blog.pageName/> |

    <data:blog.title/>

  </title> <b:else/>

  <title>

    <data:blog.pageTitle/>

  </title>

</b:if>