Generally speaking, the signature of the title bar of CAD drawings is completed by handwritten signature. This is because the handwritten signature can more truly reflect the personality and characteristics of the signer, and it is easier to be considered as true. In addition, handwritten signature can better meet some industry norms and requirements. For example, in the construction industry, handwritten signature is necessary because it can guarantee the authenticity and reliability of architectural drawings to a certain extent.

In addition, handwritten signature can also prevent drawings from being tampered with to some extent, because everyone's signature has its own unique style and characteristics. If printing is used, there may be some security risks because electronic signatures can be copied and forged.

Of course, for some special cases, such as some special industry requirements or drawings need to be digitized, printing can also be used to complete the signature. But on the whole, handwritten signature is a more reliable and safer way.