Using alt and title for a link

Alt and title are common for images, but I am curious if they are useful for a simple hyperlink? What about using a slightly different words for the title and alt (different from the original hyperlinked text).

Alt no, this is for images or other things where an alternative maybe needed video etc.

As for title yeah its quite common practice to have title for links, but not so much for SEO, nobody even knows if it makes any difference. But in terms of usability yeah its a good idea.

Try not to always think about whats best for search engines but whats best design practice to make the site work properly, think about usability and accessibility.

This is the best statement I've read in this forum in a long time.

According to me Alt is more beneficial and very useful for images and videos as Google crawlers dont crawl the images and even the videos.

You would be better off creating a sitemap that includes your images and videos which google does crawl. The process and a very good example of a sitemap that incorporates images and videos is found at Google Webmaster Central