Do webpage titles and article titles mean the same thing?

Student asked: Do the webpage title and article title mean the same thing?

Teacher’s answer: The website title belongs to the title of the web page, and the source code is the “<title></title> part”.
The article title is the title of the web page by default only on the article page, which requires technical processing.
The source code of the article title is the "<h1> </h1> part".
So, the web page title and the article title have nothing to do with each other.