Pls see at the end of a topic raised by you –
https://www.livemeshthemes.com/support/forums/topic/scaling-header-image-on-moble-iphone/
You can always hide the title if you want –
#title-area h2 { visibility; hidden; } /* SEO implications? */
The disadvantage is that it applies to all posts or pages, although there is a way to prefix this by post or page id since WP generates the required classes to make things specific to a page or post. The earlier solution works much better and resolves the header truncation issue as well.