Can I have my nipples permanently hard(erect)? Is there a procedure that will do this?

There are different ways to keep nipples erected; placement of local tissue (flap)  from areola in the nipple and/or placement of small particles of cartilage are some of the possibilities. However, with all of these procedures you may loose ability to breast feed due to need to remove nipple attachments to structures like milk ducts and associated muscles. You should have an in-person evaluation and discussion with a board certified plastic surgeon with good experience in treatment of inverted nipples and nipple reconstruction. Good luck.

Thank you for sharing your question.  There is no reliable and long-lasting procedure that can maintain your nipples in an erect state.  Hope this helps.