You can change the Title tag, if you want.
For BE "Pages", the title is controlled in page.aspx.cs by the following line of code:
base.Title = Server.HtmlEncode(Page.Title);
For BE "Posts", the title is controlled in post.aspx.cs by the following line of code:
Page.Title = Server.HtmlEncode(Post.Title);
The homepage, listings by tag, listings by category, listings by author, listings by date range and other similar listings are controlled in default.aspx.cs with the lines of code beginning with "Page.Title = .....".