Continuous carbon fiber reinforced poly‐ether–ether–ketone (CCF/PEEK) shows great potential in engineering applications attributed to superior mechanical properties together with excellent thermal and chemical resistance. In this study, a laser‐assisted additive manufacturing device was established to accurately collect and control the preheating temperature based on a coaxial infrared temperature measurement system. The influence on laser power consumption, interlaminar shear performance, and failure mechanism was investigated in condition of different preheating temperatures and printing speeds. Results indicated that the laser‐preheated specimens showed much higher ILSS with maximum values and increasing percentage reached 33.48 MPa and 157.0% compared to unpretreated specimens. With the increase of preheating temperature and printing speed, more laser power was consumed, while the ILSS and increasing percentage increased firstly and then decreased. The strengthening effect on the interlayer bonding was ascribed to promoting the penetration of PEEK molecular chain ends between adjacent layers, increasing the fluidity and enhancing the bonding effect between adjacent filament together with improving the impregnation behavior of the inner fibers. The proposed interlaminar strengthening method based on laser‐assisted preheating provides potential application prospects in aerospace and automotive industries.

CFRP composites with the advantages of enhanced mechanical properties and lightweight are recognized as an ideal material in repairing cracked structures. This paper aims to comprehensively investigate whole-field strain distribution and fracture characteristics of central inclined titanium plates repaired with CFRP laminates, with consideration of various overlap length and repair type. Results indicated that the initial central cracks significantly deteriorated mechanical performance, while inclined direction of it exhibited limited influence on repair behavior. Repairs with increased overlap length possessed superior mechanical performance and repair effectiveness. When increasing the overlap length to 80 mm, strength recovery rate for four types of repairs reached above 80.0%. Digital image correlation (DIC) results indicated that central hole was the highly strained zone for all repairs, and hole repairs presented relatively higher strain values compared with cracked repairs. Progressive failure analysis showed that repairs with initial cracks presented premature fracture of titanium plates, while hole repairs were capable to sustain load until adhesive layer fractured. Adhesive failure, cohesive failure and substrate fracture predominated on fractured surfaces irrespective of repair type and overlap length. With the increase of overlap length, cohesive failure was enhanced and light-fiber-tear/fiber-tear could be found, which corresponded to relatively higher repair effectiveness.