There is no way to disable the TITLE through backend, but you can use this trick:
Open this CSS file:
/templates/rt_kirigami/css/rt_kirigami-custom.css
and include this CSS rule:
#SpecificationsBottom .product-fields-title {display:none;}
and the duplication will be gone.
If you like PureMart and satisfied with the support you have received, please "write a review" on:
www.flexiblewebdesign.com/Virtuemart-2-Templates/PureMart
Write couple of sentences to share your experience with the support team.
Just 2-3 sentences would be enough ;) It might sound simple to you, but it is extremely important. Potential customers care about product reviews very much.
Thanks in advance!
Regards,
Support