The article deals with the peculiarities of the use of titanium in jewellery and costume jewellery. It is shown, under what conditions products, where titanium is used, are jewellery, and under what conditions, costume jewellery. Advantages and disadvantages of titanium jewellery and peculiarities of its design, production and operation are considered. It is shown that for several years leading jewellery brands have been successfully using titanium for production of advanced collections. Some examples are given. Contemporary Russian jewellers also keep up with the leading jewellery brands, demonstrating pieces made of titanium of advanced design. It is shown that though fashion for titanium products is not widespread, but unique items of titanium jewellery are more often gaining their admirers.

The polarization is examined of 585th hallmark (14 karat) standard jewelry gold alloys of different colors (red, European yellow, and white) using bipolar current pulses with different amplitude-time parameters aimed at optimizing the electrochemical polishing modes.

The article deals with the peculiarities and interaction of design and technology at different stages of the world history of enamel art. The origins and prototypes of enamel art and their step-by-step development from the Middle Ages to artistic enameling in the 20th century are revealed. The step-by-step development of various technological and visual techniques in hot-enamel art in the historical retrospective and the reflection of all accumulated experience in modern enamel art works are traced and emphasised. The art history analysis of hot enamelling studies in different countries and regions reveals the main points of enamelling development. The gradual development, influence and borrowing of different techniques, regional and technological peculiarities are underlined. The dependence of technological methods and possibilities of design relevant to different historical periods is revealed; an attempt to decipher the formulation of artistic tasks of the craftsmen of the past is made. The authors show the long experience of working out various technological methods and the necessity of preserving and direct transfer of skills from the teacher to the student. Conclusions are made about the step-by-step long-term development of hot-jeweled enamel technologies and the direct dependence of the artistic component on technological innovations, as well as the necessity to directly study all possibilities and properties of enamel worked out in the past. Modern trends in the development of enamel art are considered. The use of historical practical experience simplifies considerably the setting of new artistic tasks.

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he article deals with the design and technological features of making jewellery using hot enameling technology by Ilgiz Fazulzyanov, one of the leading Russian enameller jewellers. A retrospective of the Master's jewellery pieces showed that complex design tasks require painstaking and very labour-intensive work to solve complex technological problems associated with creating complex three-dimensional jewellery models and laying stained glass enamels on complex precious metal bases that are not visible to the public. Original solutions to these problems allowed Ilgiz Fazulzyanov to lay the foundation for creating his own jewellery brand.