The design of the doors, known as “harmonics with folding leaves”, is distinguished by practicality and unconventionality. They are a reasonable choice if the goal is to use every free space in the apartment in the most rational way possible.

The mechanism of operation of this type of interior doors is based on a built-in rail installed in the frame at the upper part of the door. Several leaves (two or four) can be folded and unfolded, so compactness and convenience are achieved, especially in smaller rooms.

The different design ideas of harmonics doors with folding leaves give a new look to the interior and diversify the environment by bringing a pleasant mood and creating a feeling of elegance and coziness.

The ability to open and close the doors in one or both directions gives interior designers a chance to use this type of door in a different way in rooms.

Most often, harmonics doors are installed in closets, wardrobe premises, but they can also be used successfully as doors in wet rooms, such as a partition between a bathroom and a wet room or a bathroom and a toilet.

The materials from which harmonics doors are made are light and resistant to scratches and mechanical damage. They are easy to clean, including with detergents. The rails on which the doors move are specially adapted to be resistant to deformation and rust.

This type of door is used quite intensively every day, and it is precisely because of this fact that quality and long-lasting materials, which will not cause problems, are emphasized in their manufacture.

The design of harmonics doors with folding leaves is preferred by practical people who want the space in their home or office to be well optimized and organized.

With this type of door, two rooms can be divided, such as a living room from a kitchen, or the space of a larger dining room can be limited. Thus, practical use of two rooms is achieved at the same time, and whenever necessary, they can be converted into one large room.

TitanDoors. Interior doors made for you!

Why harmonics by Titan Doors

Natural materials of the highest quality

Production of individual models

Various possibilities for varnishing and milling

Veneer of different types of wood

Selected models

Recent projects

Need an individual project? We will provide you with a solution tailored to all your needs!

How do we work?


A visit at our showroom or an inquiry

To discuss your needs


Inspection on site

For taking measurements and specifying details


Preparing a quote and signing a contract

Price, production time and method of payment


Production and installation

Delivery time up to 40 days and installation on site

What they say about us

Simeon Borisov


I ordered doors for my entire apartment from Titan Doors without any hesitation, because the price-quality ratio has no analogues on the market. Thanks to the whole team, Tsveti, Mira and Zoro for the professional advice, consultation and execution from the very beginning to the final installation. Thanks for the great ideas, the unconventional solutions and all the efforts to satisfy all my claims and questions. Advice for your future customers – carry out consultations with the specialists even before you have started the repair, in order to choose your style and have enough time for the production of doors.

Sonia Petrova


Hello! We are extremely pleased with Titan Doors. Very high quality doors, handles, great design. True professionals, I recommend them to all my friends. You won’t go wrong if you choose them. They installed our doors on time, the people in the office and those responsible for the installation are very responsive. We are more than satisfied. 😊

Manana Amirjanova


After a long search, we turned to the services of Titan Doors, we were pleasantly surprised by the high professionalism of both the consultants and the high-quality execution of the doors and the careful and professional work of the installers.

Borislav Atanasov


I want to express my great gratitude to everyone from the Titan Doors team. All the service from my first step into the showroom to the last touch up was done in a timely manner with great professionalism. We ordered 12 doors and were impressed with the workmanship and clean installation. Thanks to Mira and Tsveti, to Zoro, as well as to the installation guys for the accuracy and quick responses. My personal opinion is that this is the way to do business in a civilized country. Keep up the good work!

Rositsa Dencheva


We are super happy with our new doors ❤️ They made them exactly as we wanted, helped us with ideas on how to make them even more beautiful and functional! The quality really justifies the price and lead times. I highly recommend!

Get a professional consultation or make a direct inquiry about your project

Online inquiry