Alloy electrodeposition was first developed in the 1840s at nearly the same time as metal deposition, with brass coatings being an early commercial application. Despite this long history, alloy electrodeposition continues to attract attention. Principles and practice of electroplating alloys are considered in the “classic” book of A. Brenner [1]. An alloy coating may be obtained by a codeposition of the alloy constituents from the electrolyte containing their ions. Papers dealing with the electrodeposition of tungsten alloys with iron-group metals have been published as early as in 1930s [2, 3, 4]. Theoretical studies on W co-deposition with iron group metals was started by Brenner [1], Holt and Vaaler [5], Fukushima [6], and Vas'ko [7], and continues till now. Tungsten alloys with iron group metals are of interest now in both theoretical and applied aspects for their specific mechanical, tribological, anti-corrosion, magnetic, electrical and electro-erosion properties; and may compete even with ceramics and graphite by virtue of high thermal resistance. Binary, ternary, and quaternary tungsten alloys with iron group metals can be obtained from complex solutions such as pyrophosphate, gluconate or citrate based, e.g. The structure of the W-containing alloys depends on the electrodeposition conditions and ranges from crystalline to nano-crystalline. Tungsten alloys are considered as hard coatings with a nanocrystalline microstructure possess favourable wear and corrosion properties which make them extremely attractive for replacing hard Cr coatings in many applications where aggressive conditions exist including conditions where lubrication or dry friction conditions is available. Therefore, last decades the next wave of interest in tungsten alloys started when investigators from all over the world began exploring the systems under consideration: Gileadi and Eliaz (Israel, USA), Wang and Watanabe (Japan), Anatassov, Gencheva and Bratoeva (Bulgaria), Ved and Sakhnenko (Ukraine), Mizushima and Hansen (Denmark), Obradovic, Stevanovic and Despic (Yugoslavia), Kudriavtsev, Gamburg and Pavlov (Russia), Auerswald and Fecht (Switzerland, Germany), Hamid (Egypt), Weston, Harris and Shipway (UK), Podlaha (USA), Donten and Stojek (Poland) Cesiulis and Juskenas, (Lithuania), Tsyntsaru and Dikusar (Moldova). Therefore, the aim of this lecture is provide overview of theoretical and practical aspects of tungsten alloys electrodeposition including mechanical, tribological and corrosion properties.