I am not sure if this approach is correct as what will happen if you have several widgets with paging? Which page title should be considered? The idea about having paging is that all items are on the same page, but instead of consuming much screen space to "compact" them using widget`s paging option.
Despite that, this could be achieved by resolving the url (the pager adds a query string, so can be used to distinguish the pages) of each page on Page_Load event (you can add code behind from Title&Properties as shown on this screenshot
Hope this information helps.
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