Procedures to Make Hair Grow Straighter or Curlier?

Most people who have curly hair, would have it in all areas of the scalp, so that hair transplants would not be successful to straighten the hair, unless donor areas of straight hair were found and used. It has to come from you, not a different person. It is not unusual that fine hair transplanted from a donor site in the scalp to the recipient sites grows slightly wavy after transplantation. The technique is available that can uncurl hair by changing the hair follicles.

Procedure to make hair straight is not hair transplant surgery.  If you have curly hair, transplanted hair will also be curly.  A cheaper way to straighten hair is at a salon.

No, laser hair removal followed by a hair transplant will not permanently straighten hair. Hair follicles maintain their original nature concerning volume and length regardless of surgical procedures. The use of tools, conditioners, relaxers and other chemical processes can temporarily make hair more curly or straight. However, continuous use over time weakens the keratin structure. It also reduces the tensile strength of each follicle.

Making the hair straighter or curlier is not done with surgery but rather with a skilled hair stylist who can do this quite well.

As the hair follicles maintain its original characteristics the curly hair will grow curly and straight hairs grow straight. There is no surgical procedure by which a straight hair can be made to grow curly or vice versa. For making the hair straight or curly one needs a good salon/ cosmetologist.