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• In the W/Steel bonding, the effects of interlayer and intermetallics on the joints failure have been discussed. Compared the reaction products, shear strength and failure mode, the copper has been chosen as the interlayer material. • It is considered that the condition of 1000 °C, 20 MPa is rather proper to bond steel/steel interface to control the deformation of cooling channel. • Using HIP technology, we have prepared a 600 mm-long W(Cu)/steel FW straight plate. Dimension tests shown that the channel sizes were within 8 ± 0.5 mm, which has met the technical requirement. • Finally, we presented some electron-beam welding results for the assembling of sub-components. As one candidate of blankets for China Fusion Engineering Test Reactor (CFETR), the Water Cooled Ceramic Breeder (WCCB) blanket is proposed and designed in Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP). Supported by the National Key R&D Program of China, we formulated a roadmap on its manufacturing. In this work, the research and development (R&D) on bonding technology for W/Steel and Steel/Steel has been summarized first. Bonding quality was evaluated by microstructure observation and mechanical test. In the W/Steel bonding, the effects of interlayer and intermetallics on the joints failure have been discussed. In the Steel/Steel bonding, the deformation issue and the heat treatment of RAFM Steel have been presented. Then the progress on manufacturing technology and bonding quality tests of the middle-size first wall (FW) mockups also have been shown in the paper. Finally, some technology experiments of assembling weld for the sub-components have been discussed. It is considered that this research construct a foundation to manufacture the WCCB component. [ABSTRACT FROM AUTHOR]