The ideal material for highly loaded areas in a future fusion device needs to combine properties such as low sputter yield, high melting point, high thermal conductivity and moderate activation. Tungsten (W), as a promising candidate for such structures has in addition also high strength and creep resistance at elevated temperatures. However, the inherent brittleness below the ductile-to-brittle transition temperature (DBTT) and the embrittlement during operation, e.g. by overheating and/or neutron irradiation are the main drawbacks for the use of pure tungsten. To overcome this limitation, tungsten fibre-reinforced tungsten composites (W_f/W) were developed.